comm.c:  Prevent overflow of user table during iteration.

Signed-off-by:  Bart van Leeuwen <aidil@wotf.org>
Signed-off-by:  Raymond Jennings <shentino@gmail.com>
Signed-off-by: Felix A. Croes <felix@dworkin.nl>
comm.c:  Update copyright

Signed-off-by: Felix A. Croes <felix@dworkin.nl>