Update varlink doc and code

* Improved error message
* Added documentation
* Updated messages to include missing data

Signed-off-by: Jhon Honce <jhonce@redhat.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/API.md b/API.md
index b1f57c53a..4e61b7c9f 100755
--- a/API.md
+++ b/API.md
@@ -1361,6 +1361,8 @@ pids [int](https://godoc.org/builtin#int)
 ### <a name="Create"></a>type Create
 
 Create is an input structure for creating containers.
+args[0] is the image name or id
+args[1-] are the new commands if changed
 
 args [[]string](#[]string)