use non-blocking IO for pipes and socket in send_cgi

add http_send_response function that is usable for non-blocking IO

parse cgi stderr output for logging and use non-blocking pipes

refactor send_cgi into non-blocking SAF (wip)

fix prepare_service_file error handling

improve error handling in send_file if the file is a directory

add check if pidfile can be opened

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

mercurial