- 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: r269851,r272076,r274884,r282328,r285644,r286503,r286504,r286505,
r286506,r286510,r286561,r286562,r287034

Update svnlite from 1.8.10 to 1.8.14, and the support components:
serf->1.3.8, apr->1.5.2, apr-util->1.5.4, sqlite3->3.8.11.1

This includes syncing the developer templates with head.

MFC r262324: serf 1.3.4 - improve SSL handling with svn-1.8.8 and other
speedups and quality of life fixes.

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

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

Update serf 1.2.1 -> 1.3.0 for svn

Import serf-1.3.0