Fix a couple of problems with the pre/post config processing changes:

1) symptom: on system with bad/no DNS setup, ServerName isn't
   processed so init fails

cause:

  ap_fini_vhost_config() called before ap_process_config_tree(), so
  ServerName was never stored in the config structure

2) symptom: on system with virtual hosts configured, SIGSEGV in
   open_multi_logs()

cause:

   the module configs for the virtual hosts haven't been merged in
   yet, and open_multi_logs() gets NULL for the mod_log_config
   configuration

This stuff needs to be cleaned up further, exploring the use of a
post-config hook for fixup_virtual_hosts(), ap_fini_vhost_config(),
and ap_sort_hooks(), getting a lot of logic out of main(), and
processing the config tree only once.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@85522 13f79535-47bb-0310-9956-ffa450edef68