• 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)