- made a distinction about the MODE arguments received. We now return 504 in case of unimplemented MODE types ("B" and "C") and 501 in case of unrecognized MODE types. - removed the word "obsolete" from comments about MODE, STRU and ALLO commands which aren't actually obsoleted. - avoided some unnecessary "".upper() which were used twice.
- made a distinction about the MODE arguments received. We now return 504 in case of unimplemented MODE types ("B" and "C") and 501 in case of unrecognized MODE types.
- removed the word "obsolete" from comments about MODE, STRU and ALLO commands which aren't actually obsoleted.
- avoided some unnecessary "".upper() which were used twice.


giampaolo/pyftpdlib