Tests: enabled realip tests for multiple X-Forwarded-For headers.

realip.t

diff --git a/realip.t b/realip.t
index 9a6504f..25487dc 100644
--- a/realip.t
+++ b/realip.t
@@ -79,7 +79,7 @@
 
 TODO: {
 
-local $TODO = 'not yet';
+local $TODO = 'not yet' unless $t->has_version('1.3.14');
 
 like(http(<<EOF), qr/^X-IP: 10.0.1.1/m, 'realip multi xff recursive off');
 GET /1 HTTP/1.0