PATCH: [perl #132900] Blead Breaks CPAN: FELIPE/Crypt-Perl

PATCH: [perl #132900] Blead Breaks CPAN: FELIPE/Crypt-Perl

The root cause of this was using a 'char' where it should have been
'U8'.  I changed the signatures so that all the related functions take
and return U8's, and the compiler detects what should be cast to/from
char.  The functions all deal with byte bit patterns, so unsigned is the
appropriate declaration.