Refactor common man page options, phase 2

Followup to #15174. These are the options that are easy(ish)
to review: those that have only drifted slightly, and need
only minor tweaks to bring back to sanity. For the most part,
I went with the text in podman-run because that was cleaned up
in #5192 way back in 2020. These diffs primarily consist of
using '**' (star star) instead of backticks, plus other
formatting and punctuation changes.

This PR also adds a README in the options dir, and a new
convention: <<container text...|pod text...>> which tries
to do the right thing based on whether the man page name
includes "-pod-" or not. Since that's kind of hairy code,
I've also added a test suite for it.

Finally, since this is impossible to review by normal means,
I'm temporarily committing hack/markdown-preprocess-review,
a script that will diff option-by-option. I will remove it
once we finish this cleanup, but be advised that there are
still 130+ options left to examine, and some of those are
going to be really hard to reunite.

Review script usage: simply run it (you need to have 'diffuse'
installed). It isn't exactly obvious, but it shouldn't take more
than a minute to figure out. The rightmost column (zzz-chosen.md)
is the "winner", the actual content that will be used henceforth.
You really want an ultrawide screen here.

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

1 files changed, 3 insertions, 0 deletions

diff --git a/docs/source/markdown/options/cap-drop.md b/docs/source/markdown/options/cap-drop.md
new file mode 100644
index 000000000..8d7371ea2
--- /dev/null
+++ b/docs/source/markdown/options/cap-drop.md
@@ -0,0 +1,3 @@
+#### **--cap-drop**=*capability*
+
+Drop Linux capabilities.