Old RC: use vlc_socket()

This avoids leaking the Unix socket to child processes.
(cherry picked from commit cb11b7841319bd9017b76229291223c49b40d219)

modules/control/rc.c

@@ -240,7 +240,7 @@ static int Activate( vlc_object_t *p_this )
 
         msg_Dbg( p_intf, "trying UNIX socket" );
 
-        if( (i_socket = socket( PF_LOCAL, SOCK_STREAM, 0 ) ) < 0 )
+        if( (i_socket = vlc_socket( PF_LOCAL, SOCK_STREAM, 0, false ) ) < 0 )
         {
             msg_Warn( p_intf, "can't open socket: %m" );
             free( psz_unix_path );