16 characters, only check the first 16 since that is all the kernel
records. This isn't ideal, but it is probably the best we can do.
Otherwise, "killall communicator-linux-4.76.bin" will not match
the process as the kernel only records "communicator-lin".
using killall.c instead of the perl version that depends on procfs.
The C version uses sysctl(). The program is based on a hack that was
originally written about 6 years ago and has evolved somewhat since then.
(which is why it is a superset of killall.pl, rather than being a clone.)
With apologies to: wosch
