- Copy stable/10@285827 to releng/10.2 in preparation for 10.2-RC1
builds.
- Update newvers.sh to reflect RC1.
- Update __FreeBSD_version to reflect 10.2.
- Update default pkg(8) configuration to use the quarterly branch.[1]

Discussed with: re, portmgr [1]
Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

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

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

Eliminate redundant variable.

While there, trim some trailing whitespace.

Add proper const keywords to sysctl(3) parameters.

The `name' and `newp' arguments can be marked const, because the buffers
they refer to are never changed. While there, perform some other
cleanups:

- Remove K&R from sysctl.c.
- Implement sysctlbyname() using sysctlnametomib() to prevent
duplication of an undocumented kernel interface.
- Fix some whitespace nits.

It seems the prototypes are now in sync with NetBSD as well.

Fix SCM ID's.

$Id$ -> $FreeBSD$

Change a variable to type size_t to suit the sysctl prototype.

Add #include <string.h> to get prototypes.

Have sysctlbyname() take a const first arg (the ascii string)

sysctlbyname allows acces to sysctl variables by name.

The manpage has been sent to linquistic decontamination and will arrive
when released from the quarantine

Reviewed by: peter