- Copy stable/10 (r259064) to releng/10.0 as part of the
10.0-RELEASE cycle.
- Update __FreeBSD_version [1]
- Set branch name to -RC1

[1] 10.0-CURRENT __FreeBSD_version value ended at '55', so
start releng/10.0 at '100' so the branch is started with
a value ending in zero.

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

Make hash, type and ulimit available via execve().

These are specified by POSIX but are not special builtins, and therefore
need to be available via execve() and utilities like time, nohup, xargs.
(Note that hash was moved from the XSI option to the base in the 2008
standard.)

Like most of the POSIX "regular builtin commands", these need to be executed
in a shell environment for full functionality, although they may still be of
some use outside one.

Unlike the POSIX special and regular builtin commands, POSIX does not
require these to be found before a PATH search, although that could be an
oversight.

Like some of the utilities already provided by usr.bin/alias, these may lead
to confusing results when invoked from csh(1).

Use the "builtin" shell function to make sure that the requested
command is handled as a shell function. This avoids the following
peculiar behaviour when /usr/bin is on a case-insensitive filesystem:
# READ foo
(... long pause, depending upon the amount of swap space available ...)
sh: Resource temporarily unavailable.

Reported by: I can't remember; someone on IRC.
MFC after: 1 week

Start the dreaded NOFOO -> NO_FOO conversion.

OK'ed by: core

Mark bits that do not require an object directory as such.

Fix installworld.

Submitted by: Udo Schweigert <Udo.Schweigert@siemens.com>

A little bit more thought has resulted in a generic script which can
implement any of the useless POSIX-required ``regular shell builtin''
utilities, saving one frag and one inode each. The script moves to
usr.bin/alias which is alphabetically the first of these commands.