Temporary Fix: Sanitie worker id

Some android browsers send a request with a '\' character prefixed to every '&',
which causes the uuid to end with a '\'.

Author: nidhimj22

lib/server.js

@@ -223,6 +223,7 @@ exports.Server = function Server(bsClient, workers) {
         query = parseBody(body);
       } catch (e) {}
       var uuid = request.headers['x-worker-uuid'];
+      uuid = uuid && uuid.replace(/[^a-zA-Z0-9\-]/, '');
       var worker = workers[uuid] || {};
       worker._worker_key = uuid;