Have create_empty_config() create DYNAMIC_MODULE_LIMIT more vector space

than it needs, in case you put LoadModule after a <Directory> or
<VirtualHost> in a config file.

Also have add_module() complain and exit if you try and load more than
DYNAMIC_MODULE_LIMIT module.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/1.3.x@79216 13f79535-47bb-0310-9956-ffa450edef68