fix host_list type

shadowsocks/tcprelay.py

@@ -354,7 +354,8 @@ class TCPRelayHandler(object):
 
         host_port = []
         match_port = False
-        if type(host_list) == list:
+        if type(host_list) != list:
+            host_list = [host_list]
         for host in host_list:
             items = common.to_str(host).rsplit(':', 1)
             if len(items) > 1: