Fix tado bridge support

[Jc2k]

Have been trying to help Tado HASS users here.

There were 2 issues which need tweaks on the homekit_python side:

• The HTTPConnection used by pairing is injecting a Accept-Encoding: identity header - tado connection hangs if this is present. A real iPhone doesn't add an Accept-Encoding header.

• The secure http code doesn't insert a Host header. The tado drops the secure session in that case. A real iPhone does include a Host header here.

With these changes they can pair and see their thermostats.

[jlusiardi]

Well done! Is there anyway to figure this out from the spec? Do we have to include some other apple spec to make the correct REST calls?

[Jc2k]

Not that i'm aware of - i just compared wireshark logs for pairing to demoserver.py from my iPhone with homekit.pair and worked my way through the differences.

For the problems with securehttp the encryption got in the way so i enabled this specific debug log and compared my phone and homekit_python talked to demoserver:

        if AccessoryRequestHandler.DEBUG_CRYPT:
            self.log_message('crypted request >%s<', decrypted)

that was enough to flag things up.

There are still more differences - this was enough to get the tado working.