Introduce URL for app. Plugins can override this.

fixes #242

plugins/nginx-vhosts/commands

@@ -1,18 +1,2 @@
 #!/bin/bash
-set -e; case "$1" in
-
-  url)
-    if [[ -f "/home/git/$2/VHOST" ]]; then
-      echo "http://$(< "/home/git/$2/VHOST")"
-    else
-      cat
-    fi
-    ;;
-
-  help) cat && cat<<EOF
-    url <app>                                       Show the URL for an application
-EOF
-    ;;
-
-esac
 cat

plugins/nginx-vhosts/post-deploy

@@ -53,6 +53,8 @@ server {
   }
 }
 EOF
+
+  echo "https://$hostname" > "$HOME/$APP/URL"
 else
 # default nginx.conf
   cat<<EOF > $HOME/$APP/nginx.conf
@@ -73,8 +75,9 @@ server {
   }
 }
 EOF
+
+  echo "http://$hostname" > "$HOME/$APP/URL"
   fi
   pluginhook nginx-pre-reload $APP
   nc -U $HOME/reload-nginx
-  echo "$hostname" > "$HOME/$APP/VHOST"
 fi