Move SSL API comments to header files

Peter Eisentraut <peter_e@gmx.net>

Commit: f966101d19fcef6441e43da417467b3ed5ad3074
Author: Peter Eisentraut <peter_e@gmx.net>
Date: 2018-01-23T12:11:39Z
Releases: 11.0
Move SSL API comments to header files

Move the documentation of the SSL API calls are supposed to do into the
headers files, instead of keeping them in the files for the OpenSSL
implementation.  That way, they don't have to be duplicated or be
inconsistent when other implementations are added.

Files