[master] 4b895d763 use "feature ipv4"

[Nils Goroll]

commit 4b895d7632152e1526f5e7e95aa1bc6593a2820c
Author: Nils Goroll <nils.goroll at uplex.de>
Date:   Mon Jan 11 23:30:02 2021 +0100

    use "feature ipv4"
    
    from c862d49eedbc609b8bb4cb7b2fe15706ec92ffaf

diff --git a/bin/varnishtest/tests/o00005.vtc b/bin/varnishtest/tests/o00005.vtc
index d46792462..f20595589 100644
--- a/bin/varnishtest/tests/o00005.vtc
+++ b/bin/varnishtest/tests/o00005.vtc
@@ -1,8 +1,7 @@
 varnishtest "PROXY v2 TLV test"
 
-# XXX this does does not work with IPv6, the workspace overflow test
-#     is too brittle
-feature cmd {test "${localhost}" = "127.0.0.1"}
+# this does does not work with IPv6, the workspace overflow test is too brittle
+feature ipv4
 
 server s1 {
 	rxreq
diff --git a/bin/varnishtest/tests/r01312.vtc b/bin/varnishtest/tests/r01312.vtc
index cec7ad2c6..1309dbbfb 100644
--- a/bin/varnishtest/tests/r01312.vtc
+++ b/bin/varnishtest/tests/r01312.vtc
@@ -1,7 +1,7 @@
 varnishtest "acl miscompile"
 
-# XXX this test only works if we know a network prefix of localhost
-feature cmd {test "${localhost}" = "127.0.0.1"}
+# this test only works if we know a network prefix of localhost
+feature ipv4
 
 server s1 {
 	rxreq