Fix hostname resolution behavior

Previously we went to some effort to resolve the message URI hostname
to an IP address before figuring out proxies/connections, but this
turns out to be wrong for multiple reasons:

  1. Some hosts that send all requests via proxy don't even have a
     working DNS config.
     (http://bugzilla.gnome.org/show_bug.cgi?id=577532)

  2. Apparently no one expects hostnames in requests to be matched
     against IP addresses in proxy ignore lists anyway.

  3. The big web browsers all implement connection limits on a
     per-hostname basis, not a per-IP basis, and some web pages take
     advantage of this by using multiple aliases for the same host
     to get around the connection limit.

Also update tests/proxy-test to verify that the hostname is not
resolved when passing a request to a proxy.

0 files changed, 0 insertions, 0 deletions