rl_complete() and rl_list_possib(). Simply leave out complete.o from
the default build and in all programs require these two functions to
be supplied.
A better alternative would be to use function pointers and check those
for NULL in the running code. With this code, and no completion handler
the editline code will die.
=====================
Fix another build warning for Arm cross-gcc, which actually was v4.1.2
This time getpid() was missing unistd.h, but kill() was also missing
signal.h. Added test for signal.h, but left out unistd.h since we
already define SYS_UNIX -- which we should really check for instead...
The rest are cosmetic prototype or automake/autoconf fixes.
