Bump traefik to v1.1.0-rc4

library/traefik

@@ -2,8 +2,8 @@ Maintainers: Emile Vauge <[email protected]> (@emilevauge),
              Vincent Demeester <[email protected]> (@vdemeester)
 GitRepo: https://github.com/containous/traefik-library-image.git
 
-Tags: v1.1.0-rc3, camembert
-GitCommit: c806dba0c56314dc4969e1223d7e39ea183de4ac
+Tags: v1.1.0-rc4, camembert
+GitCommit: c8760c0b023570d7fff14934fa340759f8174e00
 
 Tags: v1.0.3, reblochon, latest
 GitCommit: 9d877ca7171211aabc2955ab1a301a685f6852fe