[Libguestfs] [PATCH nbdkit v3 0/4] build: Replace ./nbdkit with a C program.

v1 was here: https://www.redhat.com/archives/libguestfs/2018-November/msg00147.html v2 was here: https://www.redhat.com/archives/libguestfs/2018-November/msg00152.html v3: - Use optarg != NULL as a sentinel for has_arg. - Moved some variable decls into the inner loop. - Make nbdkit wrapper depend on config.status, so if srcdir or builddir changes then we rebuild the wrapper. It probably does so anyway because <config.h> will change, but let's be safe. - Document NBDKIT_VALGRIND=1 and NBDKIT_GDB=1. - Add two extra patches which fix existing uses of NBDKIT_VALGRIND. - Retested (make check && make check-valgrind). Rich.