Fixes:
* building some modules (lzma) on Darwin (use PREFIX, instead of /usr/local, to look for libraries)
* building decimal module on certain enviroments (use relative path to look for includes, as absolute path might get rejected by a wrapper)
+ Mesa-9.1.6, MesaLib-9.1.6, dd_rescue-1.37, libgee-0.10.3,
  openttd-1.3.2.
Remove pkg-config *.pc files from standard place.

* Avoid potential conflicts between xulrunners.
* Fix buildlink3.mk to handle pc files properly.
Bump PKGREVISION for previous.
Updated devel/xulrunner17 to 17.0.7nb1
Whitespace, from jmc@openbsd.
Fix default options in man page. From jmc@openbsd.
Updated package to fix PR pkg/47709 - didn't fix all of the pre-existing
pkglint errors, but the problem described in the problem report is fixed.
1.2.2 was released on 2013-07-28. It is the latest stable FFmpeg release from the 1.2 release branch, which was cut from master on 2013-03-07. Amongst lots of other changes, it includes all changes from ffmpeg-mt, libav master of 2013-03-07, libav 9 as of 2013-03-07.
Updated multimedia/ffmpeg to 20130728.1.2.2; multimedia/ffplay to 1.2.2