always use inline functions.

Initialize context properly for HMAC pkey method.

on failure. Keep output format consistent with previous versions.

Also flush stdout after printing ACCEPT in s_server.

in legacy code). I'd rather just remove it along with legacy interface,
but it's probably not as appropriate as I'd like. Reimplement the macro.

PR: 1517
Submitted by: vinschen@redhat.com

Submitted by: Martin.Kraemer@Fujitsu-Siemens.com

PR: 1526

Submitted by: vitus@cryptocom.ru

Revert change in 1516 because it breaks Windows build. Use a modified version
of the headers from s_client.c which has used similar functionality without
any problems.