* When inserting a new rule in `insert_after_rule`, check if the old rule is
the last rule, to avoid a list index out of range error when attempting to
access the next rule.
* Add a test for inserting a new rule after the last rule.
* Added . and / to rule args regexp
Things like pam_echo.so file=/etc/foo.txt weren't being matched and
causing incorrect change counts. Adding / and . fixed that.
Fixes#33351
* pamd: test argument with value
Relates #33351
