Disable unittests requiring a running HTTP server on port 80.

--- a/tests/check/gnet/gnetinetaddr.c.old	2014-09-27 17:56:51.130350306 +0200
+++ b/tests/check/gnet/gnetinetaddr.c	2014-09-27 17:57:23.396114568 +0200
@@ -443,7 +443,7 @@
 
 GNET_START_TEST (test_inetaddr_list_async)
 {
-  do_test_inetaddr_list_async ("localhost");
+/*  do_test_inetaddr_list_async ("localhost"); */
 /* FIXME: these might not work right yet because of the timings in the test
 #ifdef GNET_ENABLE_NETWORK_TESTS
   do_test_inetaddr_list_async ("www.google.com");
@@ -573,7 +573,7 @@
 
 GNET_START_TEST (test_inetaddr_name_async)
 {
-  do_test_inetaddr_name_async ("localhost");
+/*  do_test_inetaddr_name_async ("localhost"); */
 
 /* FIXME: these might not work right yet because of the timings in the test
 #ifdef GNET_ENABLE_NETWORK_TESTS
@@ -798,7 +798,7 @@
 
 GNET_START_TEST (test_inetaddr_reverse_async)
 {
-  do_test_inetaddr_reverse_async ("localhost");
+/*  do_test_inetaddr_reverse_async ("localhost"); */
 
 #ifdef GNET_ENABLE_NETWORK_TESTS
   do_test_inetaddr_reverse_async ("gabe.freedesktop.org");