- 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)

MFC 274398,274537:
Move NFS and TFTP filesystems before the synthetic filesystems (bzip,
gzip, and split).

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

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

Remove spinconsole from pc98, some parts seem to be missed and it's
too late (early?) to figure out what exactly.

Reported by: TAKAHASHI Yoshihiro

Add new loader console type: "spinconsole". This console selects the
video console which doesn't take any input from keyboard and hides
all output replacing it with ``spinning'' character (useful for
embedded products and custom installations).

Sponsored by: Sippy Software, Inc.

MFi386: Add support for preloading ELF relocatable object format modules.

Use __FBSDID().
Also some minor style cleanups.

Fix to build pc98 boot loader after support amd64.