Merge branch 'issue-212' into devel
[ruby] Fix self.spec usage for finding text
Remove annoying newline in output
pylint fixes
generic: clean up warning message.
mock: clean up warning message.
Dont display useless spec url when --prebuilt
autotools: don't check for autoconf yet (#219).
Add some debug timing info
generic_autotools: use regular sources if buildsrc unavailable.
Don't use mock if it's not installed (#208), bugfixes.

The --prebuilt situation is using mock if it's installed, otherwise
the buildsrc is undefined i. e. buildsrc.is_available() is false.
Require --prebuilt if mock is unavailable. Retire the public
Mock.rpm_eval(), leftover from earlier work.
mock: don't warn for no mock, just info
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