remove some close() calls to socket
remove some close() calls to socket

The socket is closed in the destructor, and when explicitly stopped.

MKV21/glimpse_client,HSAnet/glimpse_client,HSAnet/glimpse_client,MKV21/glimpse_client,HSAnet/glimpse_client,HSAnet/glimpse_client,MKV21/glimpse_client,HSAnet/glimpse_client,MKV21/glimpse_client,MKV21/glimpse_client