Save a few bytes in conf pool when processing 'AllowOverrideList'.

The 'override_list' table is allocated from the cmd->pool, just as all strings from argv[].
So there is no need to duplicate them.

+ some minor style issues

git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@1713040 13f79535-47bb-0310-9956-ffa450edef68