Apply Hallvard's ctype 'unsigned char' fix from -devel.

CHANGES

clients/fax500/main.c

clients/fax500/rp500.c

clients/finger/main.c

clients/gopher/go500.c

clients/gopher/go500gw.c

clients/mail500/main.c

clients/rcpt500/main.c

clients/rcpt500/query.c

clients/tools/ldapmodify.c

clients/ud/auth.c

clients/ud/edit.c

clients/ud/group.c

clients/ud/main.c

clients/ud/mod.c

clients/ud/print.c

clients/ud/ud.h

clients/ud/util.c

contrib/saucer/main.c

contrib/whois++/command.c