Feat CCT-468: Add explanatory info about the source of overrides in r…

…epo-overrides

command

The requrements are to put statements containing additional info about `subscription-manager repo-override --list`
and about `subscription-manager repo-override --remove` to respective parts of man pages.

CARD CCT-467

man/subscription-manager.8

@@ -604,8 +604,8 @@ option
 .B --remove=NAME
 Removes a named override from the repositories specified with the
 .B --repo
-option
-
+option.  Overrides inherited from environments the system belongs in will not be removed. They can only be removed by either: removing them from the environment they originate from or removing the system from those environments.
+The source will not be removed if its source is one of the environment(s) the system belongs in. It can only be removed by either: removing the override from the environment it originates from or removing the system from the environment the override originates from.
 .TP
 .B --remove-all
 Removes all overrides from repositories specified with the
@@ -616,7 +616,8 @@ option
 .B --list
 Lists all overrides from repositories specified with the
 .B --repo
-option
+option. Source of the listed overrides is a union of the override specified at the system itself and all the overrides set in the environment(s) the system belongs in.
+
 
 
 .SS IDENTITY OPTIONS