mod_status, mod_echo: Fix the display of client addresses. They were truncated to 31 characters which is not enough for IPv6 addresses.

PR 54848 [Bernhard Schmidt <berni birkenwald de>]

git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@1519556 13f79535-47bb-0310-9956-ffa450edef68