bump length of subdomain to 10

lib/rand_id.js

@@ -1,12 +1,13 @@
+// all url safe
+// can't use uppercase because hostnames are lowercased
+var chars = 'abcdefghijklmnopqrstuvwxyz';
 
-var chars = 'abcdefghiklmnopqrstuvwxyz';
 module.exports = function rand_id() {
     var randomstring = '';
-    for (var i=0; i<4; ++i) {
+    for (var i=0; i<10; ++i) {
         var rnum = Math.floor(Math.random() * chars.length);
         randomstring += chars[rnum];
     }
 
     return randomstring;
 }
-