add httpclient test for sending websocket messages

implement httpclient websocket IO

add nsapi_set_saf_return_callback as preparation for proxy saf testing

httpclient: prepare httpstream for websockets

implement HttpStream raw mode: raw mode disables read counter

add httpclient broken response test

increase request content length in test_http_client_post_ctlen_large, fix test_httpclient

(0) -300 -100 -30 -10 -7 +7 +10 tip

mercurial