Fixed shutdown RpcConnection memory leak problem with RpcServer

import gc

import ssl

import time

import errno

import socket

import select

import weakref

import logging

import threading

from sjrpc.core import RpcConnection

import pyev

            conn = self._wrap(sock)

            self.register(conn)

    def _clean_conn(self, ref):

        '''

        Callback called by weakref when an object is about to be collected by

        garbage collector.

        '''

        try:

            self._clients.remove(ref)

        except KeyError:

            pass

#

# Public methods:

#

        :param conn: the connection to register.

        '''

        self._clients.add(conn)

        self._clients.add(weakref.ref(conn, self._clean_conn))

        gc.collect() # Force a manual garbage collection to avoid memory leak

                     # with RpcConnections. This is maybe not required but I

                     # need to read docs about python's gc and circular refs.

    def unregister(self, conn, shutdown=False):

        '''

        if conn in self._clients:

            if shutdown:

                conn.shutdown()

            self._clients.remove(conn)

    def run(self):

        '''