[Libguestfs] [PATCH 0/2] build: Replace ./nbdkit with a C program.

This patch series solves the FreeBSD shebang problem in a completely different way, and a few other things besides. I propose that we replace ./nbdkit with a C program. The C program is a straightforward translation of the shell script. Some advantages of this approach are: - We can parse options in exactly the same way as the real program. - Use the more accurate ‘is_short_name’ test for unadorned plugin/filter names on the command line. - Fixes the FreeBSD problem with shebangs caused because FreeBSD refuses the use a shell script as a shebang path. - No longer need to maintain that troublesome shell script. I have verified that this does indeed fix the FreeBSD shebang problem (but didn't test on Haiku). It also passes 'make check' and 'make check-valgrind' on Linux. Rich.