MFC r312118,r312121:

r312118:

Fix -Wformat issue with zero-length format string passed to err(3)

Tested with: clang, gcc 4.2.1, gcc 4.9

r312121:

Follow up to r312118

State that execve failed instead of just printing out the program name
and strerror(errno) via err(3).

MFC r282061:

Integrate tools/regression/execve into the FreeBSD test suite as
tests/sys/kern/execve

Integrate tools/regression/execve into the FreeBSD test suite as
tests/sys/kern/execve

MFC after: 1 week

Integrate tools/regression/execve into the FreeBSD test suite as tests/sys/kern/execve

Integrate more tests into the FreeBSD test suite from tools/regression, etc

Add a ${CP} alias for copying files in the build.

Some users build FreeBSD as non-root in Perforce workspaces. By default,
Perforce sets files read-only unless they're explicitly being edited.
As a result, the -f argument must be used to cp in order to override the
read-only flag when copying source files to object directories. Bare use of
'cp' should be avoided in the future.

Update all current users of 'cp' in the src tree.

Reviewed by: emaste
MFC after: 1 week
Sponsored by: Spectra Logic

NO_MAN= has been deprecated in favor of MAN= for some time, go ahead
and finish the job. ncurses is now the only Makefile in the tree that
uses it since it wasn't a simple mechanical change, and will be
addressed in a future commit.

o Grammar.

Submitted by: kris

o Enable test-sparceaout test since alc@ has fixed the panic in rev. 1.229
sys/vm/vnode_pager.c.
cVS: ----------------------------------------------------------------------

Output directory has gone, remove it from Makefile.

Fix test for empty interpreter.

o Add various regression tests for execve(2) syscall.

Obtained from: NetBSD