[ruby] Fix self.spec usage for finding text
review_helper: remove annoying newline in output.
pylint fixes
generic: clean up warning message.
mock: clean up warning message.
Dont display useless spec url when --prebuilt
check_base: attachments without header, change default sort key.
check_base, checks: support tests returning NA + attachments.
plugins: use default attachment sort key, not hard-coded 10.
Provide better feedback on active plugins and flags.
Use new mechanism for all f-r state output at end of report.
Support display and modification of active plugin list.

Adds two new options --display-plugins and --plugins to display
and modify what plugins to run, the decision by default made
by is_applicable().
Update plugins to handle user enabling with --plugins option.
NEWS update