NTLMv2 proxy support works with "http" urls, but not for "https" urls.

Tested with demobrowser ( examples\webkitwidgets\browser ).
Proxy-Server: squid/3.2.13

I'm trying to join the "qt-project.org".
All right with the scheme "http://".

Problems arise with the scheme "https://":

My client sent twice:
"
CONNECT qt-project.org:443 HTTP/1.1
Proxy-Connection: keep-alive
Host: qt-project.org
User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.21 (KHTML, like Gecko) demobrowser/0.1 Safari/537.21
Proxy-Authorization: NTLM TlRMTVNTUAABAAAABQIAAAAAAAAAAAAAAAAAAAAAAAA=
"

With same "Proxy-Authorization: NTLM TlRMTVNTUAABAAAABQIAAAAAAAAAAAAAAAAAAAAAAAA="

After that, connection was refused.