NETCONN_FLAG_CHECK_WRITESPACE macro

If a nonblocking write has been rejected before, poll_tcp needs to

Syntax

#define NETCONN_FLAG_CHECK_WRITESPACE 0x10

Location	Text
api.h:82	#define NETCONN_FLAG_CHECK_WRITESPACE 0x10
api_msg.c:377	if (conn->flags & NETCONN_FLAG_CHECK_WRITESPACE) {
api_msg.c:382	netconn_clear_flags(conn, NETCONN_FLAG_CHECK_WRITESPACE);
api_msg.c:416	netconn_clear_flags(conn, NETCONN_FLAG_CHECK_WRITESPACE);
api_msg.c:1734	conn->flags \|= NETCONN_FLAG_CHECK_WRITESPACE;