md5sum/sha1sum: add --status and --check, fix --check with multiple files.

Annoyingly coreutils and busybox both have the --status functionality,
but coreutils only accepts --status and busybox only accepts -s. Although
all extant users known to me use --status I've supported both (a) for
maximum compatibility and (b) because Rob hates longopts :-)

Also, -c/--check don't take argument(s): they alter the interpretation
of all the FILE... arguments.

I removed a bunch of dead code here, but I couldn't switch us over to
loopfiles_lines because I didn't want to regress on the "warn if any
check file contains no hashes", and loopfiles_lines doesn't give you
any way to recognize that you've moved on to the next file.

0 files changed, 0 insertions, 0 deletions