MINOR: add ::1 to predefined LOCALHOST acl

The "LOCALHOST" ACL currently matches only 127.0.0.1/8. This adds the
IPv6 "::1" address to the supported patterns.
diff --git a/doc/configuration.txt b/doc/configuration.txt
index db6656c..b0a79bf 100644
--- a/doc/configuration.txt
+++ b/doc/configuration.txt
@@ -20557,7 +20557,7 @@
 HTTP_URL_ABS     url_reg ^[^/:]*://                 match absolute URL with scheme
 HTTP_URL_SLASH   url_beg /                          match URL beginning with "/"
 HTTP_URL_STAR    url     *                          match URL equal to "*"
-LOCALHOST        src 127.0.0.1/8                    match connection from local host
+LOCALHOST        src 127.0.0.1/8 ::1                match connection from local host
 METH_CONNECT     method  CONNECT                    match HTTP CONNECT method
 METH_DELETE      method  DELETE                     match HTTP DELETE method
 METH_GET         method  GET HEAD                   match HTTP GET or HEAD method
diff --git a/src/acl.c b/src/acl.c
index 6d11a0b..480dd11 100644
--- a/src/acl.c
+++ b/src/acl.c
@@ -754,7 +754,7 @@
 } default_acl_list[] = {
 	{ .name = "TRUE",           .expr = {"always_true",""}},
 	{ .name = "FALSE",          .expr = {"always_false",""}},
-	{ .name = "LOCALHOST",      .expr = {"src","127.0.0.1/8",""}},
+	{ .name = "LOCALHOST",      .expr = {"src","127.0.0.1/8","::1",""}},
 	{ .name = "HTTP",           .expr = {"req.proto_http",""}},
 	{ .name = "HTTP_1.0",       .expr = {"req.ver","1.0",""}},
 	{ .name = "HTTP_1.1",       .expr = {"req.ver","1.1",""}},