revert: libevent 2.0 support

configure.ac

@@ -2146,11 +2146,12 @@ if test $ol_enable_balancer != no ; then
 			[have_libevent=yes
 			LEVENT_LIBS="$LEVENT_LIBS -levent"],
 			[have_libevent=no])])
+	AC_CHECK_LIB(event, libevent_global_shutdown, [], [have_libevent=no])
 
 	if test $have_libevent = yes ; then
 		AC_DEFINE(HAVE_LIBEVENT, 1, [define if you have -levent])
 	else
-		AC_MSG_ERROR([You need libevent 2.0 or later with DNS support to build the load balancer])
+		AC_MSG_ERROR([You need libevent 2.1 or later with DNS support to build the load balancer])
 	fi
 fi
 

servers/lloadd/daemon.c

@@ -1266,10 +1266,6 @@ lloadd_daemon( struct event_base *daemon_base )
 
     assert( daemon_base != NULL );
 
-#ifndef EVDNS_BASE_INITIALIZE_NAMESERVERS /* libevent 2.0 support */
-#define EVDNS_BASE_INITIALIZE_NAMESERVERS 1
-#endif /* !EVDNS_BASE_INITIALIZE_NAMESERVERS */
-
     dnsbase = evdns_base_new( daemon_base, EVDNS_BASE_INITIALIZE_NAMESERVERS );
     if ( !dnsbase ) {
         Debug( LDAP_DEBUG_ANY, "lloadd startup: "
@@ -1326,7 +1322,7 @@ lloadd_daemon( struct event_base *daemon_base )
         }
     }
 
-    event = evtimer_new( daemon_base, operations_timeout, NULL );
+    event = evtimer_new( daemon_base, operations_timeout, event_self_cbarg() );
     if ( !event ) {
         Debug( LDAP_DEBUG_ANY, "lloadd: "
                 "failed to allocate timeout event\n" );

servers/lloadd/libevent_support.c

@@ -167,7 +167,5 @@ lload_libevent_init( void )
 void
 lload_libevent_destroy( void )
 {
-#if ( EVENT__NUMERIC_VERSION >= 0x02010000 )
     libevent_global_shutdown();
-#endif
 }

servers/lloadd/operation.c

@@ -614,6 +614,7 @@ connection_timeout( LloadConnection *upstream, void *arg )
 void
 operations_timeout( evutil_socket_t s, short what, void *arg )
 {
+    struct event *self = arg;
     LloadBackend *b;
     time_t threshold;
 
@@ -652,7 +653,7 @@ operations_timeout( evutil_socket_t s, short what, void *arg )
 done:
     Debug( LDAP_DEBUG_TRACE, "operations_timeout: "
             "timeout task finished\n" );
-    evtimer_add( lload_timeout_event, lload_timeout_api );
+    evtimer_add( self, lload_timeout_api );
 }
 
 void