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
 };
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<tr><td><span title='2022-04-19 18:07:49 +0200'>2022-04-19</span></td><td><a href='/guix/commit/tests/guix-home.sh?id=d4af1ff177e2b8a70535aa078c07556c25607a66'>tests: Adjust 'guix home' test to 'home-files-service-type' changes.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2022-03-19 18:51:09 +0100'>2022-03-19</span></td><td><a href='/guix/commit/tests/guix-home.sh?id=094a2cfbe45c104d0da30ff9d975d052ca0c118c'>guix home: Add 'container' command.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2022-03-18 16:03:33 +0100'>2022-03-18</span></td><td><a href='/guix/commit/tests/guix-home.sh?id=25261cbf96a3bf58abc6e836d71bdabe9154a83c'>guix home: Implement the 'extension-graph' and 'shepherd-graph' actions.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2022-03-10 11:43:14 +0100'>2022-03-10</span></td><td><a href='/guix/commit/tests/guix-home.sh?id=5fabaf112858c5c5e8787e83f8f2002fdc710917'>tests: Check 'guix home reconfigure' for a second generation.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2022-03-10 11:43:14 +0100'>2022-03-10</span></td><td><a href='/guix/commit/tests/guix-home.sh?id=26e67e0280f9e35543c8ea71c6a3d58beb83287d'>tests: Simplify use of 'local-file' in 'tests/guix-home.sh'.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2022-03-10 11:43:14 +0100'>2022-03-10</span></td><td><a href='/guix/commit/tests/guix-home.sh?id=7b7e32d5adc22582c0b0b23157432eb7ea0cc5da'>tests: Make sure 'guix home reconfigure' backs up files.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2021-10-09 19:24:19 +0300'>2021-10-09</span></td><td><a href='/guix/commit/tests/guix-home.sh?id=fee0bced7fec2f9950957976a28f033edd4f877c'>home: services: configuration: Support file-like objects.</a><span class='msg-avail'>...</span></td><td>Oleg Pykhalov</td></tr>
<tr><td><span title='2021-10-09 19:24:19 +0300'>2021-10-09</span></td><td><a href='/guix/commit/tests/guix-home.sh?id=5e68f7a7b338951dcc227799a51c59d9ac77c696'>tests: Add guix-home.sh.</a><span class='msg-avail'>...</span></td><td>Oleg Pykhalov</td></tr>