trac82 consistently use CONTEXT_PORT_NO_LISTEN

Signed-off-by: Andy Green <andy.green@linaro.org>
Reset hdr_parsing_completed for WSI_STATE_HTTP:

This fixes a bug where a client issues two GET requests on the same connection
(keep-alive). If the second request is split into two reads, the
hdr_parsing_complete flag gets us into trouble by ending the request read two
early and giving us bogus data.
Merge branch 'hotfix/hdr_parse_flag' into nytd_build