Disable tests that rely on usable DNS lookups, which aren't available
in build chroots.

--- libevent-2.0.21-stable/test/regress_dns.c	2013-01-20 22:32:09.000000000 +0100
+++ libevent-2.0.21-stable/test/regress_dns.c	2013-01-20 22:32:30.000000000 +0100
@@ -2120,10 +2120,6 @@
 
 struct testcase_t dns_testcases[] = {
 	DNS_LEGACY(server, TT_FORK|TT_NEED_BASE),
-	DNS_LEGACY(gethostbyname, TT_FORK|TT_NEED_BASE|TT_NEED_DNS|TT_OFF_BY_DEFAULT),
-	DNS_LEGACY(gethostbyname6, TT_FORK|TT_NEED_BASE|TT_NEED_DNS|TT_OFF_BY_DEFAULT),
-	DNS_LEGACY(gethostbyaddr, TT_FORK|TT_NEED_BASE|TT_NEED_DNS|TT_OFF_BY_DEFAULT),
-	{ "resolve_reverse", dns_resolve_reverse, TT_FORK|TT_OFF_BY_DEFAULT, NULL, NULL },
 	{ "search_empty", dns_search_empty_test, TT_FORK|TT_NEED_BASE, &basic_setup, NULL },
 	{ "search", dns_search_test, TT_FORK|TT_NEED_BASE, &basic_setup, NULL },
 	{ "search_lower", dns_search_lower_test, TT_FORK|TT_NEED_BASE, &basic_setup, NULL },
@@ -2163,9 +2159,6 @@
 
 	{ "client_fail_requests", dns_client_fail_requests_test,
 	  TT_FORK|TT_NEED_BASE, &basic_setup, NULL },
-	{ "client_fail_requests_getaddrinfo",
-	  dns_client_fail_requests_getaddrinfo_test,
-	  TT_FORK|TT_NEED_BASE, &basic_setup, NULL },
 
 	END_OF_TESTCASES
 };
uild-aux/cuirass?id=e22b88b68d3e06151196c1d3eb89ee14240b804c'>tree</a><a href='/guix/commit/build-aux/cuirass?id=e22b88b68d3e06151196c1d3eb89ee14240b804c'>commit</a><a href='/guix/diff/build-aux/cuirass?id=e22b88b68d3e06151196c1d3eb89ee14240b804c'>diff</a></td><td class='form'><form class='right' method='get' action='/guix/log/build-aux/cuirass'>
<input type='hidden' name='id' value='e22b88b68d3e06151196c1d3eb89ee14240b804c'/><select name='qt'>
<option value='grep'>log msg</option>
<option value='author'>author</option>
<option value='committer'>committer</option>
<option value='range'>range</option>
</select>
<input class='txt' type='search' size='10' name='q' value=''/>
<input type='submit' value='search'/>
</form>
</td></tr></table>
<div class='path'>path: <a href='/guix/log/?id=e22b88b68d3e06151196c1d3eb89ee14240b804c'>root</a>/<a href='/guix/log/build-aux?id=e22b88b68d3e06151196c1d3eb89ee14240b804c'>build-aux</a>/<a href='/guix/log/build-aux/cuirass?id=e22b88b68d3e06151196c1d3eb89ee14240b804c'>cuirass</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/guix/log/build-aux/cuirass?id=e22b88b68d3e06151196c1d3eb89ee14240b804c&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2020-10-04 14:04:14 +0200'>2020-10-04</span></td><td><a href='/guix/commit/build-aux/cuirass?id=fdbf8a7a75e9d63957ea6d8a63181aa131edeaea'>cuirass: Add hurd-manifest.</a><span class='msg-avail'>...</span></td><td>Jan (janneke) Nieuwenhuizen</td></tr>
<tr><td><span title='2018-04-08 17:48:33 +0200'>2018-04-08</span></td><td><a href='/guix/commit/build-aux/cuirass?id=351f384e57939005b25fa976952e3a0e08785893'>cuirass: Add job specs for the modular Guix.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2018-04-08 17:48:33 +0200'>2018-04-08</span></td><td><a href='/guix/commit/build-aux/cuirass?id=a1ec7540be9b30593f5e83e36a0e83b1bcf337f1'>cuirass: Factorize hydra-to-cuirass CI job translation.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2018-01-15 15:18:03 +0100'>2018-01-15</span></td><td><a href='/guix/commit/build-aux/cuirass?id=403f2dccfcf992573ceeeae7c76c71b4884d3cd4'>cuirass: Properly convert list of &lt;license&gt; objects.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2017-09-27 22:19:28 +0200'>2017-09-27</span></td><td><a href='/guix/commit/build-aux/cuirass?id=66bc1d2aaf74fc7eb4ef9b3519c69bd37142ffb3'>cuirass: Add gnu-system build spec.</a><span class='msg-avail'>...</span></td><td>Jan Nieuwenhuizen</td></tr>