Update to 1.0047

Upstream changes:
1.0047  2018-02-10 01:23:37 PST
    [BUG FIXES]
        - Disable FCGI/lighttpd test that was supposed to be releng only #611

1.0046  2018-02-09 23:51:10 PST
    [NEW FEATURES]
        - Support psgix.cleanup and psgix.harakiri in FCGI handler (afresh1) #610

    [IMPROVEMENTS]
        - Do not set TCP_NODELAY when it's unavailable in embedded systems (dex4er) #579

(wen)