git 2.8.1 not working with socks5h https proxy anymore

[Felix Ruess <felix.ruess@gmail.com>]

Hi all,

I just encountered a problem with the latest git version (2.8.1) that
looks like a regression to me:
When trying to clone a repo via a https socks5 proxy the connection times out:

$ git config --global 'http.proxy=socks5h://127.0.0.1:1080'
$ export GIT_CURL_VERBOSE=1
$ git clone https://foo.de/bar.git
Cloning into 'bar'...
* Couldn't find host foo.de in the .netrc file; using defaults
* Hostname was NOT found in DNS cache
*   Trying 127.0.0.1...
* Hostname was NOT found in DNS cache
* 80
* 147
* 201
* 194
channel 2: open failed: connect failed: Connection timed out
channel 4: open failed: connect failed: Connection timed out
* Failed to receive SOCKS5 connect request ack.
* Closing connection 0
fatal: unable to access 'https://foo.de/bar.git/': Failed to receive
SOCKS5 connect request ack.

I'm on Ubuntu 14.04 64bit and it works perfectly fine with git 1.9.1
(and was also working with older git 2.x versions, although not sure
any more what the last working version was).

Cheers, Felix