These used to live in TODO but we got rid off them. Make sure
we keep track of what we want to support by printing a message
when those flags are unimplemented.
Factor out the code from md5sum and sha1sum into a util function.
Use FILE * instead of a file descriptor. This will make it a bit
easier/more consistent when we implement support for the -c option.
FRIGN
Daniel Bainton
Hiltjo Posthuma
sin
stateless