Mods to improve stability for Zephora.

TCPServer.cpp

@@ -70,9 +70,11 @@ namespace core {
 
    void TCPServer::removeFromSessionList(TCPSession *session) {
       std::vector<TCPSession *>::iterator cursor;
+		lock.lock();
       for(cursor = sessions.begin(); cursor < sessions.end(); ++cursor)
         if(*cursor == session)
           sessions.erase(cursor);
+		lock.unlock();
    }
 
    void TCPServer::sessionErrorHandler(std::string errorString, std::stringstream &out) {