When restarting, reset ap_server_config_defines to what was set on the command

line. This makes the result more predictable for the user and resolves some
string lifetime issues in the implementation of set_define/unset_define.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@1033619 13f79535-47bb-0310-9956-ffa450edef68