- address issue of using send-pr to submit bugs
- add link for using bugzilla for reporting bugs
- drop committers mailing list and point users to community mailing lists

PR:		195432
Differential Revision:	https://reviews.freebsd.org/D1237
Reported by:	kim.grasman@gmail.com
Reviewed by:	remko, wblock (mentors)
Approved by:	wblock (mentor)