move libevent into base

base/third_party/libevent/test/regress_dns.c

 /*
  * Copyright (c) 2003-2006 Niels Provos <provos@citi.umich.edu>
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
@@ skipping 356 matching lines @@
 {
         dns_server(); /* Do this before we call evdns_init. */
 
         evdns_init();
         dns_gethostbyname();
         dns_gethostbyname6();
         dns_gethostbyaddr();
 
         evdns_shutdown(0);
 }