whitelist: Read multiple commands until client closes connection

This restores the same behavior we had before e11c02c8, and fixes the whitelist
add/remove-from command.

src/libcharon/plugins/whitelist/whitelist_control.c

@@ -99,11 +99,8 @@ static bool on_accept(private_whitelist_control_t *this, stream_t *stream)
 	identification_t *id;
 	whitelist_msg_t msg;
 
-	if (!stream->read_all(stream, &msg, sizeof(msg)))
+	while (stream->read_all(stream, &msg, sizeof(msg)))
 	{
-		return FALSE;
-	}
-
 		msg.id[sizeof(msg.id) - 1] = 0;
 		id = identification_create_from_string(msg.id);
 		switch (ntohl(msg.type))
@@ -131,6 +128,7 @@ static bool on_accept(private_whitelist_control_t *this, stream_t *stream)
 				break;
 		}
 		id->destroy(id);
+	}
 
 	return FALSE;
 }