sni support

[kiorky]

It would be good to have support for sni in zc.buildout.download for both buildout1 & 2 when using python2.

One idea would do like pip either to switch from urllib over to requests or directly urllib3, but that would implies including extra init deps (ndg.httpsclient, pyasn1, urllib3)

That was reported two times (on plone dev & distutils sig), just lazy to refind the links, but i'm biten again by this bug today.

[kiorky]

http://thread.gmane.org/gmane.comp.web.zope.plone.user/124015

[kiorky]

https://mail.python.org/pipermail/distutils-sig/2014-December/025331.html

[kiorky]

for the record, a way to reproduce the bug is to use this part:

[handlebars]
recipe=hexagonit.recipe.download
url=https://cloud.github.com/downloads/wycats/handlebars.js/handlebars-1.0.0.beta.6.js
download-only=true

[kiorky]

rels hexagonit/hexagonit.recipe.download#33

[kiorky]

cc @seanupton