Use snake_case for Connection etc methods

src/server.hpp

@@ -92,7 +92,7 @@ struct Server : std::enable_shared_from_this<Server> {
    * @return File descriptor for the client end of the socketpair, or -1 on
    * error
    */
-  int createLocalConnection();
+  int create_local_connection();
 
   /**
    * Release a connection back to its server for continued processing.
@@ -105,7 +105,7 @@ struct Server : std::enable_shared_from_this<Server> {
    *
    * @param connection unique_ptr to the connection being released back
    */
-  static void releaseBackToServer(std::unique_ptr<Connection> connection);
+  static void release_back_to_server(std::unique_ptr<Connection> connection);
 
 private:
   friend struct Connection;