Add versionadded directives for new yumpkg option

Also some miscellaneous RST fixes and some spacing fixes to make pylint
happy.
Merge pull request #11477 from terminalmage/pull-11420-docs-fix

Add versionadded directives for new yumpkg option
Fix to rh_ip.py to allow the networking enabled code to function.  Similar fix made in the debian_ip module where the if statement was expecting networking as the value in the array but the value was enabled.