- Fix heimdal-gssapi.pc.
- Add an UPDATING entry.

PR:	195319
Add -rpath forgotten in the previous commit.
- Update from 2.3.3 to 2.3.6
- Take maintainership
- Use options helpers
- Simplify Makefile
- Use options helpers
- Simplify Makefile
- Take maintainership
graphics/linux-c6-gdk-pixbuf: rename to -pixbuf2

- Rename gdk-pixbuf to linux-c6-gdk-pixbuf2 to properly distinguish between
  linux- gdk-pixbuf 1 and 2.
- Change consumers dependencies to match.

PR: 		195120, 195121
Differential Revision:	https://reviews.freebsd.org/D1192
Submitted by:	Jan Beich <jbeich@vfemail.net>
Reviewed by:	rene (emulation)
Approved by:	swills (mentor)
Approved by:	portmgr (swills)