MINOR: mux-h1: pass the profile's HTTP hardening checks into the h1c and h1s

MINOR: mux-h1: pass the profile's HTTP hardening checks into the h1c and h1s

This adds the pointer to the chosen http_hardening profile to h1c, and
sets an http_hdng_chk on h1s. In h1c_init() we simply use the
connection's target to get the hardening profile. It is either a server,
or a listener, in which case we access its bind_conf's profile. If none
is found, we check if we have an untruted source address and set it to
untrusted, otherwise we fall back to trusted. Then we can preset the
http_hdng_chk rules in h1s from the mask of the profile pointed
to by h1c.

For now the returned information, if set, are not exploited.