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

[pbrezina]

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

pbrezina commented:
"""
I fixed the hang. It was created due to newly added test in KCM patches that uses POST to create a container. Tcurl test tool can provide body to POST operation which was mandatory in the first patch, optional in the second.
"""

See the full comment at https://github.com/SSSD/sssd/pull/198#issuecomment-290040746