patches for tcsh's built in kill(1) and manpages

[Matthew Dillon]

:Hi,
:
:Attached are some patches for contrib/tcsh that teaches the built-in
:kill command in tcsh about SIGCKPT and SIGCKPTEXIT. The built-in
:kill in tcsh seems to override /bin/kill.
:
:Also, a patch (to be applied in lib/) to add the signals to
:libc/gen/signal.3 and libcr/gen/signal.3
:
:Cheers,
:Emiel

    Thanks Emiel, I've comitted it.

					-Matt