- 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

The including makefile's directory is tried first for .include "...".

secure/ build fixes:

- TELNETOBJDIR is gone. `buildworld' already installs libtelnet.a
in ${WORLDTMP}/usr/lib, and we have LIBRARY_PATH pointing there.

- SSHDIR (formerly SSHSRC) is now shared between all SSH modules.
New LIBSSH is introduced for libssh.a (an internal static lib).
Previously, build without prior `obj' was broken; SSH modules
always looked for libssh.a in ${.OBJDIR}. Also, the dependancies
on the libssh.a were missing.

- libtelnet/ did not install the crypto version of telnet.h into
/usr/include/arpa.

- Removed BINOWN, BINMODE, BINDIR and SRCS with default values.

Reviewed by: markm

- MAN[1-9] -> MAN.

Do not override BINDIR settings from subdirectory Makefiles.

Submitted by: bde

Add the OpenSSH userland-building Makefiles.