Add early printf support, wrapped in #if 0 because it's only rarely needed.
Document r261504 - FreeBSD/i386 guests can be run under bhyve.
Document r261498 - ping uses the Capsicum framework to drop privileges
Document r261344 - mdocml have been upgraded to version 1.12.3
Documetn r261991 - llvm/clang have been upgraded to version 3.4

Approved by:	hrs (mentor)