FreeBSD-specific improvements:
- working WiFi geolocation [1] (can be turned off in preferences)
- fix build with clang (use external libvpx)
- use SysV SHM model and where possible OS_BSD, which saves some patches
- no need to use ZygoteProcess switch
HTML5 audio is currently broken.
PR: ports/174402 [1]
Submitted by: J.R. Oldroyd <fbsd@opal.com> [1]
Security: http://www.vuxml.org/freebsd/46bd747b-5b84-11e2-b06d-00262d5ed8ee.html
