Since we don't use getopt_long() nothing outside the getopt()
implementation itself uses this structure, so move it into the
source to remove it from visibility and clashes with libc's
ok dtucker@
openbsd-compat/getopt_long.c regress/modpipe.c] Remove getopt.c, add
portability code to getopt_long.c and switch over Makefile and the ugly
hack in modpipe.c. Fixes bz#1448.