Modernize the portmgr part of the website (part 1).
- Replace pointyhat.FreeBSD.org by pkg-status.FreeBSD.org
- The ports tree is branched now
- Remove mentions of "repocopies", these were leftovers from the CVS era.
- Update instructions for handling PRs
Parts of the PR were already committed independently by rene
at 2017-01-01 when FreeBSD 9.3, 10.1 and 10.2 reached their EOL.
Apply some igor fixes while here.
PR: 213056
Submitted by: linimon
Reviewed by: mat