Updated mainline nginx to 1.11.6.

library/nginx

@@ -3,12 +3,12 @@
 Maintainers: NGINX Docker Maintainers <[email protected]> (@nginxinc)
 GitRepo: https://github.com/nginxinc/docker-nginx.git
 
-Tags: 1.11.5, mainline, 1, 1.11, latest
-GitCommit: 8921999083def7ba43a06fabd5f80e4406651353
+Tags: 1.11.6, mainline, 1, 1.11, latest
+GitCommit: de8822d8d91ff0802989bc0a12f8ab55596a513c
 Directory: mainline/jessie
 
-Tags: 1.11.5-alpine, mainline-alpine, 1-alpine, 1.11-alpine, alpine
-GitCommit: 8921999083def7ba43a06fabd5f80e4406651353
+Tags: 1.11.6-alpine, mainline-alpine, 1-alpine, 1.11-alpine, alpine
+GitCommit: de8822d8d91ff0802989bc0a12f8ab55596a513c
 Directory: mainline/alpine
 
 Tags: 1.10.2, stable, 1.10