[SSSD] [sssd PR#198][comment] secrets: support https in proxy provider

[lslebodn]

URL: https://github.com/SSSD/sssd/pull/198
Title: #198: secrets: support https in proxy provider

lslebodn commented:
"""
hmm, it still fails with rhel{6,7}.

http://sssd-ci.duckdns.org/logs/job/66/07/summary.html
"""

See the full comment at https://github.com/SSSD/sssd/pull/198#issuecomment-289998205