[BUG] config: disable 'option httplog' on TCP proxies

Gabriel Sosa reported that logs were appearing with BADREQ when
'option httplog' was used with a TCP proxy (eg: inherited via a
default instance). This patch detects it and falls back to tcplog
after emitting a warning.
(cherry picked from commit 5f0bd6537f8b56b643ef485d7a3c96d996d9b01a)
1 file changed