* backport [19017]

Patch by ILEoo to make the telnet interface work with "telnet" again (on linux). Looks ok according to the recv(2) manpage. Please fix if this is flawed.

modules/control/telnet.c

@@ -382,7 +382,7 @@ static void Run( intf_thread_t *p_intf )
                                    cl->i_mode + 2 );
                 }
 
-                if( i_recv <= 0 )
+                if( i_recv == 0  || ( i_recv == -1 &&  errno != EAGAIN && errno != 0 ) )
                 {
                     net_Close( cl->fd );
                     TAB_REMOVE( p_intf->p_sys->i_clients ,