Added implementations for sig2str() and str2sig() in libc/signal
in order to improve POSIX compliance. Added fucntion prototypes
in libc/include/sys/signal.h.
2015-06-23 Jon Turney <jon.turney@dronecode.org.uk>
* libc/signal/signal.tex: Use texinfo not makedoc markup.
* libc/stdio/stdio.tex: Ditto.
Signed-off-by: Jon TURNEY <jon.turney@dronecode.org.uk>