Added compiler branch hints.
Adjust maximum DHT value count per IP/network dynamically with DHT size.
Only define gethostbyname_error() when getaddrinfo() is missing.
http_send_status(): loudly complain when we cannot send back the whole body.
Added specifications for strlcpy() and strlcat() from the BSD man page.
http_send_status(): be careful when truncating body on a kept-alive connection.
Updated French translation.