[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:
"""
BTW the 1st patch "tcurl: add support for ssl and raw output" caused a hang in test_secrets and therefore internal CI was blocked whole night. The 2nd patch "tcurl test: refactor so new options can be added more easily" fixed the test.
"""

See the full comment at https://github.com/SSSD/sssd/pull/198#issuecomment-290006897