update changelog, travis-ci test

ChangeLog

@@ -2,6 +2,7 @@ UNRELEASED
   * (bugfix) Exit code should be 2 when the hostname can't be resolved
             (fixes #98, reported by @green-fox)
   * (feature) Ignore network and broadcast for cidrs /31 and /32 (#102, Martin Topholm)
+  * (bugfix)  Fix issue compliling on RHEL/Centos 7 (#95, @jbackman)
 
 2015-10-21  David Schweikert  <david@schweikert.ch>
   * Version 3.13

ci/test-01-basics.pl

@@ -13,6 +13,7 @@ use Test::More;
 
 # ping ::1
 SKIP: {
+    system("/sbin/ifconfig >&2");
     if(system("/sbin/ifconfig | grep inet6") != 0) {
         skip 'No IPv6 on this host', 3;
     }