[fix] rng() now outputs positive int and increased nginx name bucket

- [fix] changed od flag from -i to -d to generate unsigned numbers
 - the param -i can create negative numbers in dash
 - [fix] increased server_names_hash_bucket_size to 64
 - to accommodate for large domain names with (many) subdomains

proxy/files/nginx.conf

@@ -15,7 +15,9 @@ http {
     scgi_temp_path        /tmp/scgi_temp; 
 
     client_max_body_size 1m;
-        
+    # set larger name bucket for large domain names
+    server_names_hash_bucket_size  64;
+    
     server {
         listen 8080 default_server;