[CI:DOCS] Add CI check for SEE ALSO in man pages

Add new CI check to confirm that links and references
in SEE ALSO sections are properly formatted and that
links are valid (at least in theory: we do no actual
URL fetching to test for 404).

The check is piggybacked into existing xref-helpmsgs-manpages
script. It could conceivably be more elegant to write a
separate tool for this purpose, but I don't wish to duplicate
the logic for finding and reading markdown files.

Script identified various problems, which I fix in this PR:

  . missing '**' (asterisks) around some references, or '**'
    in the wrong place.

  . links pointing to github.com/.../tree/ instead of /blob/
    (github redirects those automatically, but I like
    consistency)

  . a few copy-paste errors, e.g. subgid linking to subuid.

Signed-off-by: Ed Santiago <santiago@redhat.com>

11 files changed, 9 insertions, 11 deletions

diff --git a/docs/source/markdown/podman-auto-update.1.md b/docs/source/markdown/podman-auto-update.1.md
index 4952e09dc..755f46d70 100644
--- a/docs/source/markdown/podman-auto-update.1.md
+++ b/docs/source/markdown/podman-auto-update.1.md
@@ -141,4 +141,4 @@ $ podman auto-update
 ```
 
 ## SEE ALSO
-**[podman(1)](podman.1.md)**, **[podman-generate-systemd(1)](podman-generate-systemd.1.md)**, **[podman-run(1)](podman-run.1.md)**, sd_notify(3), systemd.unit(5)
+**[podman(1)](podman.1.md)**, **[podman-generate-systemd(1)](podman-generate-systemd.1.md)**, **[podman-run(1)](podman-run.1.md)**, **sd_notify(3)**, **[systemd.unit(5)](https://www.freedesktop.org/software/systemd/man/systemd.unit.html)**
diff --git a/docs/source/markdown/podman-build.1.md b/docs/source/markdown/podman-build.1.md
index 1367c860a..40bd7d8aa 100644
--- a/docs/source/markdown/podman-build.1.md
+++ b/docs/source/markdown/podman-build.1.md
@@ -1021,7 +1021,7 @@ If you are using `useradd` within your build script, you should pass the
 useradd to stop creating the lastlog file.
 
 ## SEE ALSO
-**[podman(1)](podman.1.md)**, **[buildah(1)](https://github.com/containers/buildah/blob/main/docs/buildah.1.md)**, **[containers-certs.d(5)](https://github.com/containers/image/blob/main/docs/containers-certs.d.5.md)**, **[containers-registries.conf(5)](https://github.com/containers/image/blob/main/docs/containers-registries.conf.5.md)**, **[crun(1)](https://github.com/containers/crun/tree/main/crun.1.md)**, **[runc(8)](https://github.com/opencontainers/runc/blob/master/man/runc.8.md)**, **[useradd(8)](https://www.unix.com/man-page/redhat/8/useradd)**, **[podman-ps(1)](podman-ps.1.md)**, **[podman-rm(1)](podman-rm.1.md)**, **[Containerfile(5)](https://github.com/containers/buildah/blob/main/docs/Containerfile.5.md)**, **[containerignore(5)](https://github.com/containers/buildah/blob/main/docs/containerignore.5.md)**
+**[podman(1)](podman.1.md)**, **[buildah(1)](https://github.com/containers/buildah/blob/main/docs/buildah.1.md)**, **[containers-certs.d(5)](https://github.com/containers/image/blob/main/docs/containers-certs.d.5.md)**, **[containers-registries.conf(5)](https://github.com/containers/image/blob/main/docs/containers-registries.conf.5.md)**, **[crun(1)](https://github.com/containers/crun/blob/main/crun.1.md)**, **[runc(8)](https://github.com/opencontainers/runc/blob/master/man/runc.8.md)**, **[useradd(8)](https://www.unix.com/man-page/redhat/8/useradd)**, **[podman-ps(1)](podman-ps.1.md)**, **[podman-rm(1)](podman-rm.1.md)**, **[Containerfile(5)](https://github.com/containers/buildah/blob/main/docs/Containerfile.5.md)**, **[containerignore(5)](https://github.com/containers/buildah/blob/main/docs/containerignore.5.md)**
 
 ## HISTORY
 Aug 2020, Additional options and .containerignore added by Dan Walsh `<dwalsh@redhat.com>`
diff --git a/docs/source/markdown/podman-completion.1.md b/docs/source/markdown/podman-completion.1.md
index 639332365..7679f74b1 100644
--- a/docs/source/markdown/podman-completion.1.md
+++ b/docs/source/markdown/podman-completion.1.md
@@ -61,4 +61,4 @@ completion output to a file and source that to the user's powershell profile.
 More information about profiles is available with **Get-Help about_Profiles**.
 
 ## SEE ALSO
-**[podman(1)](podman.1.md)**, zsh(1), fish(1), powershell(1)
+**[podman(1)](podman.1.md)**, **zsh(1)**, **fish(1)**, **powershell(1)**
diff --git a/docs/source/markdown/podman-container-cleanup.1.md b/docs/source/markdown/podman-container-cleanup.1.md
index 29e34f1cf..e58519ac3 100644
--- a/docs/source/markdown/podman-container-cleanup.1.md
+++ b/docs/source/markdown/podman-container-cleanup.1.md
@@ -51,7 +51,7 @@ $ podman container cleanup mywebserver myflaskserver 860a4b23
 ```
 
 ## SEE ALSO
-**[podman(1)](podman.1.md)**, **[podman-container(1)](podman-container.1.md)**, conmon(8)
+**[podman(1)](podman.1.md)**, **[podman-container(1)](podman-container.1.md)**, **[conmon(8)](https://github.com/containers/conmon/blob/main/docs/conmon.8.md)**
 
 ## HISTORY
 Jun 2018, Originally compiled by Dan Walsh <dwalsh@redhat.com>
diff --git a/docs/source/markdown/podman-container-runlabel.1.md b/docs/source/markdown/podman-container-runlabel.1.md
index cee20046d..7078b07e4 100644
--- a/docs/source/markdown/podman-container-runlabel.1.md
+++ b/docs/source/markdown/podman-container-runlabel.1.md
@@ -84,7 +84,7 @@ $ podman container runlabel --display run foobar
 ```
 
 ## SEE ALSO
-**[podman(1)](podman.1.md)**, **[crun(1)](https://github.com/containers/crun/tree/main/crun.1.md)**, **[runc(8)](https://github.com/opencontainers/runc/blob/master/man/runc.8.md)**, **[containers-certs.d(5)](https://github.com/containers/image/blob/main/docs/containers-certs.d.5.md)**, **[containers-auth.json(5)](https://github.com/containers/image/blob/main/docs/containers-auth.json.5.md)**, **[containers-registries.conf(5)](https://github.com/containers/image/blob/main/docs/containers-registries.conf.5.md)**
+**[podman(1)](podman.1.md)**, **[crun(1)](https://github.com/containers/crun/blob/main/crun.1.md)**, **[runc(8)](https://github.com/opencontainers/runc/blob/master/man/runc.8.md)**, **[containers-certs.d(5)](https://github.com/containers/image/blob/main/docs/containers-certs.d.5.md)**, **[containers-auth.json(5)](https://github.com/containers/image/blob/main/docs/containers-auth.json.5.md)**, **[containers-registries.conf(5)](https://github.com/containers/image/blob/main/docs/containers-registries.conf.5.md)**
 
 ## HISTORY
 August 2021, Refinements by Valentin Rothberg (rothberg at redhat dot com)
diff --git a/docs/source/markdown/podman-create.1.md b/docs/source/markdown/podman-create.1.md
index bc926875f..b0d7b8f12 100644
--- a/docs/source/markdown/podman-create.1.md
+++ b/docs/source/markdown/podman-create.1.md
@@ -1537,7 +1537,7 @@ page.
 NOTE: Use the environment variable `TMPDIR` to change the temporary storage location of downloaded container images. Podman defaults to use `/var/tmp`.
 
 ## SEE ALSO
-**[podman(1)](podman.1.md)**, **[podman-save(1)](podman-save.1.md)**, **[podman-ps(1)](podman-ps.1.md)**, **[podman-attach(1)](podman-attach.1.md)**, **[podman-pod-create(1)](podman-pod-create.1.md)**, **[podman-port(1)](podman-port.1.md)**, **[podman-start(1)](podman-start.1.md)**, **[podman-kill(1)](podman-kill.1.md)**, **[podman-stop(1)](podman-stop.1.md)**, **[podman-generate-systemd(1)](podman-generate-systemd.1.md)**, **[podman-rm(1)](podman-rm.1.md)**, **[subgid(5)](https://www.unix.com/man-page/linux/5/subuid)**, **[subuid(5)](https://www.unix.com/man-page/linux/5/subuid)**, **[containers.conf(5)](https://github.com/containers/common/blob/main/docs/containers.conf.5.md)**, **[systemd.unit(5)](https://www.freedesktop.org/software/systemd/man/systemd.unit.html)**, **[setsebool(8)](https://man7.org/linux/man-pages/man8/setsebool.8.html)**, **[slirp4netns(1)](https://github.com/rootless-containers/slirp4netns/blob/master/slirp4netns.1.md)**, **[fuse-overlayfs(1)](https://github.com/containers/fuse-overlayfs/blob/main/fuse-overlayfs.1.md)**, **proc(5)**, **[conmon(8)](https://github.com/containers/conmon/blob/main/docs/conmon.8.md)**, **personality(2)**.
+**[podman(1)](podman.1.md)**, **[podman-save(1)](podman-save.1.md)**, **[podman-ps(1)](podman-ps.1.md)**, **[podman-attach(1)](podman-attach.1.md)**, **[podman-pod-create(1)](podman-pod-create.1.md)**, **[podman-port(1)](podman-port.1.md)**, **[podman-start(1)](podman-start.1.md)**, **[podman-kill(1)](podman-kill.1.md)**, **[podman-stop(1)](podman-stop.1.md)**, **[podman-generate-systemd(1)](podman-generate-systemd.1.md)**, **[podman-rm(1)](podman-rm.1.md)**, **[subgid(5)](https://www.unix.com/man-page/linux/5/subgid)**, **[subuid(5)](https://www.unix.com/man-page/linux/5/subuid)**, **[containers.conf(5)](https://github.com/containers/common/blob/main/docs/containers.conf.5.md)**, **[systemd.unit(5)](https://www.freedesktop.org/software/systemd/man/systemd.unit.html)**, **[setsebool(8)](https://man7.org/linux/man-pages/man8/setsebool.8.html)**, **[slirp4netns(1)](https://github.com/rootless-containers/slirp4netns/blob/master/slirp4netns.1.md)**, **[fuse-overlayfs(1)](https://github.com/containers/fuse-overlayfs/blob/main/fuse-overlayfs.1.md)**, **proc(5)**, **[conmon(8)](https://github.com/containers/conmon/blob/main/docs/conmon.8.md)**, **personality(2)**
 
 ## HISTORY
 October 2017, converted from Docker documentation to Podman by Dan Walsh for Podman `<dwalsh@redhat.com>`
diff --git a/docs/source/markdown/podman-generate-systemd.1.md b/docs/source/markdown/podman-generate-systemd.1.md
index 4d1e22201..0acbb9d8c 100644
--- a/docs/source/markdown/podman-generate-systemd.1.md
+++ b/docs/source/markdown/podman-generate-systemd.1.md
@@ -235,7 +235,7 @@ CONTAINER ID  IMAGE                            COMMAND  CREATED        STATUS
 bb310a0780ae  docker.io/library/alpine:latest  /bin/sh  3 minutes ago  Created                      busy_moser
 ```
 ## SEE ALSO
-**[podman(1)](podman.1.md)**, **[podman-container(1)](podman-container.1.md)**, **systemctl(1)**, **systemd.unit(5)**, **systemd.service(5)**, **[conmon(8)](https://github.com/containers/conmon/blob/main/docs/conmon.5.md)**
+**[podman(1)](podman.1.md)**, **[podman-container(1)](podman-container.1.md)**, **systemctl(1)**, **systemd.unit(5)**, **systemd.service(5)**, **[conmon(8)](https://github.com/containers/conmon/blob/main/docs/conmon.8.md)**
 
 ## HISTORY
 April 2020, Updated details and added use case to use generated .service files as root and non-root, by Sujil Shah (sushah at redhat dot com)
diff --git a/docs/source/markdown/podman-rmi.1.md b/docs/source/markdown/podman-rmi.1.md
index 39c2e8f04..5fe0efa18 100644
--- a/docs/source/markdown/podman-rmi.1.md
+++ b/docs/source/markdown/podman-rmi.1.md
@@ -53,7 +53,6 @@ $ podman rmi -a -f
   **125** The command fails for any other reason
 
 ## SEE ALSO
-podman(1), skopeo-delete(1)
 **[podman(1)](podman.1.md)**, **[skopeo-delete(1)](https://github.com/containers/skopeo/blob/main/docs/skopeo-delete.1.md)**
 
 ## HISTORY
diff --git a/docs/source/markdown/podman-run.1.md b/docs/source/markdown/podman-run.1.md
index 6eca6b0fa..0fdd47a78 100644
--- a/docs/source/markdown/podman-run.1.md
+++ b/docs/source/markdown/podman-run.1.md
@@ -1891,7 +1891,7 @@ page.
 NOTE: Use the environment variable `TMPDIR` to change the temporary storage location of downloaded container images. Podman defaults to use `/var/tmp`.
 
 ## SEE ALSO
-**[podman(1)](podman.1.md)**, **[podman-save(1)](podman-save.1.md)**, **[podman-ps(1)](podman-ps.1.md)**, **[podman-attach(1)](podman-attach.1.md)**, **[podman-pod-create(1)](podman-pod-create.1.md)**, **[podman-port(1)](podman-port.1.md)**, **[podman-start(1)](podman-start.1.md)**, **[podman-kill(1)](podman-kill.1.md)**, **[podman-stop(1)](podman-stop.1.md)**, **[podman-generate-systemd(1)](podman-generate-systemd.1.md)**, **[podman-rm(1)](podman-rm.1.md)**, **[subgid(5)](https://www.unix.com/man-page/linux/5/subuid)**, **[subuid(5)](https://www.unix.com/man-page/linux/5/subuid)**, **[containers.conf(5)](https://github.com/containers/common/blob/main/docs/containers.conf.5.md)**, **[systemd.unit(5)](https://www.freedesktop.org/software/systemd/man/systemd.unit.html)**, **[setsebool(8)](https://man7.org/linux/man-pages/man8/setsebool.8.html)**, **[slirp4netns(1)](https://github.com/rootless-containers/slirp4netns/blob/master/slirp4netns.1.md)**, **[fuse-overlayfs(1)](https://github.com/containers/fuse-overlayfs/blob/main/fuse-overlayfs.1.md)**, **proc(5)**, **[conmon(8)](https://github.com/containers/conmon/blob/main/docs/conmon.8.md)**, **personality(2)**.
+**[podman(1)](podman.1.md)**, **[podman-save(1)](podman-save.1.md)**, **[podman-ps(1)](podman-ps.1.md)**, **[podman-attach(1)](podman-attach.1.md)**, **[podman-pod-create(1)](podman-pod-create.1.md)**, **[podman-port(1)](podman-port.1.md)**, **[podman-start(1)](podman-start.1.md)**, **[podman-kill(1)](podman-kill.1.md)**, **[podman-stop(1)](podman-stop.1.md)**, **[podman-generate-systemd(1)](podman-generate-systemd.1.md)**, **[podman-rm(1)](podman-rm.1.md)**, **[subgid(5)](https://www.unix.com/man-page/linux/5/subgid)**, **[subuid(5)](https://www.unix.com/man-page/linux/5/subuid)**, **[containers.conf(5)](https://github.com/containers/common/blob/main/docs/containers.conf.5.md)**, **[systemd.unit(5)](https://www.freedesktop.org/software/systemd/man/systemd.unit.html)**, **[setsebool(8)](https://man7.org/linux/man-pages/man8/setsebool.8.html)**, **[slirp4netns(1)](https://github.com/rootless-containers/slirp4netns/blob/master/slirp4netns.1.md)**, **[fuse-overlayfs(1)](https://github.com/containers/fuse-overlayfs/blob/main/fuse-overlayfs.1.md)**, **proc(5)**, **[conmon(8)](https://github.com/containers/conmon/blob/main/docs/conmon.8.md)**, **personality(2)**
 
 ## HISTORY
 September 2018, updated by Kunal Kushwaha `<kushwaha_kunal_v7@lab.ntt.co.jp>`
diff --git a/docs/source/markdown/podman-search.1.md b/docs/source/markdown/podman-search.1.md
index 0d72a6882..9e166fcc2 100644
--- a/docs/source/markdown/podman-search.1.md
+++ b/docs/source/markdown/podman-search.1.md
@@ -144,7 +144,6 @@ Note: This works only with registries that implement the v2 API. If tried with a
 registries.conf is the configuration file which specifies which container registries should be consulted when completing image names which do not include a registry or domain portion.
 
 ## SEE ALSO
-podman(1), containers-registries.conf(5)
 **[podman(1)](podman.1.md)**, **[containers-registries(5)](https://github.com/containers/image/blob/main/docs/containers-registries.5.md)**
 
 ## HISTORY
diff --git a/docs/source/markdown/podman.1.md b/docs/source/markdown/podman.1.md
index 20de42f1d..daa8212c5 100644
--- a/docs/source/markdown/podman.1.md
+++ b/docs/source/markdown/podman.1.md
@@ -400,7 +400,7 @@ The Network File System (NFS) and other distributed file systems (for example: L
 For more information, please refer to the [Podman Troubleshooting Page](https://github.com/containers/podman/blob/master/troubleshooting.md).
 
 ## SEE ALSO
-**[containers-mounts.conf(5)](https://github.com/containers/common/blob/main/docs/containers-mounts.conf.5.md)**, **[containers.conf(5)](https://github.com/containers/common/blob/main/docs/containers.conf.5.md)**, **[containers-registries.conf(5)](https://github.com/containers/image/blob/main/docs/containers-registries.conf.5.md)**, **[containers-storage.conf(5)](https://github.com/containers/storage/blob/main/docs/containers-storage.conf.5.md)**, **[buildah(1)](https://github.com/containers/buildah/blob/main/docs/buildah.1.md)**, **oci-hooks**(5), **[containers-policy.json(5)](https://github.com/containers/image/blob/main/docs/containers-policy.json.5.md)**, **[crun(1)](https://github.com/containers/crun/tree/main/crun.1.md)**, **[runc(8)](https://github.com/opencontainers/runc/blob/master/man/runc.8.md)**, **[subuid(5)](https://www.unix.com/man-page/linux/5/subuid)**, **[subgid(5)](https://www.unix.com/man-page/linux/5/subgid)**, **[slirp4netns(1)](https://github.com/rootless-containers/slirp4netns/blob/master/slirp4netns.1.md)**, **[conmon(8)](https://github.com/containers/conmon/blob/main/docs/conmon.8.md)**
+**[containers-mounts.conf(5)](https://github.com/containers/common/blob/main/docs/containers-mounts.conf.5.md)**, **[containers.conf(5)](https://github.com/containers/common/blob/main/docs/containers.conf.5.md)**, **[containers-registries.conf(5)](https://github.com/containers/image/blob/main/docs/containers-registries.conf.5.md)**, **[containers-storage.conf(5)](https://github.com/containers/storage/blob/main/docs/containers-storage.conf.5.md)**, **[buildah(1)](https://github.com/containers/buildah/blob/main/docs/buildah.1.md)**, **oci-hooks(5)**, **[containers-policy.json(5)](https://github.com/containers/image/blob/main/docs/containers-policy.json.5.md)**, **[crun(1)](https://github.com/containers/crun/blob/main/crun.1.md)**, **[runc(8)](https://github.com/opencontainers/runc/blob/master/man/runc.8.md)**, **[subuid(5)](https://www.unix.com/man-page/linux/5/subuid)**, **[subgid(5)](https://www.unix.com/man-page/linux/5/subgid)**, **[slirp4netns(1)](https://github.com/rootless-containers/slirp4netns/blob/master/slirp4netns.1.md)**, **[conmon(8)](https://github.com/containers/conmon/blob/main/docs/conmon.8.md)**
 
 ## HISTORY
 Dec 2016, Originally compiled by Dan Walsh <dwalsh@redhat.com>