The old max share name length limit was 80 due to Windows NET SHARE
command not allowing more than that.  However, share names can be much
longer.  This is a more reasonable maximum share name length.
Signed-off-by: Scott Lovenberg <scott.lovenberg@gmail.com>
Reviewed-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <smfrench@gmail.com>