- Copy stable/10@296371 to releng/10.3 in preparation for 10.3-RC1
builds.
- Update newvers.sh to reflect RC1.
- Update __FreeBSD_version to reflect 10.3.
- Update default pkg(8) configuration to use the quarterly branch.

Approved by: re (implicit)

Copy head (r256279) to stable/10 as part of the 10.0-RELEASE cycle.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

Type-change to ssize_t to (app|pl)ease ppc platform.

Don't override the perfectly good default ->zalloc and ->zfree functions.

Fix a bunch of trivial whitespace mistakes and update the miniobj.h
file before the real work starts.

Fix a cornercase during search

Fix two bugs introduced in conversion to FreeBSD source tree:

Off by one error in length calcuation of string records.
Don't attempt to free stack variable.

Add the fifolog tools to FreeBSD.

Quoth the man-page:

Fifologs provide a compact round-robin circular storage for recording
text and binary information to permanent storage in a bounded and pre-
dictable fashion, time and space wise.

Not yet connected to the build, but feel free to test & review.