posix: upgrade libevent from 1.4.7 to 1.4.13

third_party/libevent/evport.c

 /*
  * Submitted by David Pacheco (dp.spambait@gmail.com)
  *
  * 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
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 104 matching lines @@
         int ed_pending[EVENTS_PER_GETN]; /* fd's with pending events */
 };
 
 static void*    evport_init     (struct event_base *);
 static int      evport_add      (void *, struct event *);
 static int      evport_del      (void *, struct event *);
 static int      evport_dispatch (struct event_base *, void *, struct timeval *);
 static void     evport_dealloc  (struct event_base *, void *);
 
 const struct eventop evportops = {
-        "event ports",
+        "evport",
         evport_init,
         evport_add,
         evport_del,
         evport_dispatch,
         evport_dealloc,
         1 /* need reinit */
 };
 
 /*
  * Initialize the event port implementation.
  */
 
 static void*
 evport_init(struct event_base *base)
 {
         struct evport_data *evpd;
         int i;
         /*
          * Disable event ports when this environment variable is set 
          */
-        if (getenv("EVENT_NOEVPORT"))
+        if (evutil_getenv("EVENT_NOEVPORT"))
                 return (NULL);
 
         if (!(evpd = calloc(1, sizeof(struct evport_data))))
                 return (NULL);
 
         if ((evpd->ed_port = port_create()) == -1) {
                 free(evpd);
                 return (NULL);
         }
 
@@ skipping 347 matching lines @@
         struct evport_data *evpd = arg;
 
         evsignal_dealloc(base);
 
         close(evpd->ed_port);
 
         if (evpd->ed_fds)
                 free(evpd->ed_fds);
         free(evpd);
 }