etherpad fixes

services/nginx/default.conf

@@ -8,7 +8,7 @@ server {
     set $dokuwiki dokuwiki;
     #charset koi8-r;
     #access_log  /var/log/nginx/host.access.log  main;
-
+    client_max_body_size 10M;
     location / {
 #        root   /usr/share/nginx/html;
  #       index  index.html index.htm;
@@ -36,6 +36,9 @@ server {
 	proxy_redirect / /etherpad/;
 	proxy_set_header Host $host;
 	proxy_buffering off;
+    sub_filter /static/plugins/ /etherpad/static/plugins/;
+    sub_filter /etherpad/etherpad/static/plugins/ /etherpad/static/plugins/;
+    sub_filter_once off;
     }
     location /dev {
         rewrite_log on;