tests/test-issue433

hg serve: add clearer message when starting the server with --verbose

Explicitly tell the address is the one the process is bound to.
Fix the printing of IPv6 addresses.

#!/bin/sh
# http://www.selenic.com/mercurial/bts/issue433

hg init a
cd a
echo a > a
hg commit -Ama

hg parents -r 0 doesnotexist
true