[PROTON-750] Have distinct API to indicate SSL layer is not really implemented

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: proton-0.9
• Fix Version/s: proton-0.9
• Component/s: proton-c
• Labels: API
• Assignee: Andrew Stitcher
• Reporter: Andrew Stitcher
• Created: 17/Nov/14 19:54
• Updated: 07/Jan/16 12:13
• Resolved: 10/Dec/14 21:39

Description

Currently the pn_ssl_domain() API is overloaded to indicate that SSL support isn't really present (it return NULL) in this case.

However this has proven to be brittle in the case the SSL support is partially there. For example in the continuing implementation of SSL for Windows.

It make more sense to unambiguously say that SSL if fully present with a specific API.