Split implementations from generic code

controllers/nginx/rootfs/ingress-controller/clean-nginx-conf.sh

@@ -0,0 +1,8 @@
+#!/bin/bash
+
+# This script removes consecutive empty lines in nginx.conf
+# Using sed is more simple than using a go regex
+
+# first sed removes empty lines
+# second sed command replaces the empty lines
+sed -e 's/^  *$/\'$'\n/g' | sed -e '/^$/{N;/^\n$/d;}'