Change mod_ssl from using ssl_log() to ap_log_error().

Change mod_ssl from using ssl_log() to ap_log_error().

The issue is that ssl_log doesn't handle apr_status_t result codes.  This
leads to a number of places (esp. with mutexes) where the error codes get
lost.  Rather than extending ssl_log further, since mod_ssl is part of
our core, migrate to ap_log_error.  This means that mod_ssl no longer
does its own logging.

Most uses of SSL_ADD_ERRNO are now mapped correctly to apr_status_t values
(mainly because the APIs that used to return errnos are now APRized and
have apr_status_t codes available).

SSL_LOG_TRACE and SSL_LOG_DEBUG were mapped to the APLOG_DEBUG values.
mod_ssl prints out a LOT of debugging information, so mod_ssl with LogLevel
Debug may not be a good idea - perhaps mod_ssl should be less chatty.

Numerous printf type collisions were also resolved.

(The ssl logging code itself will be removed in a subsequent commit.)

This has been discussed on dev@httpd, but the fact that there isn't
much to review besides the mindless changes, I'm going to commit now
and rely on CTR if I screwed up anything on the translation.

git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk/modules/ssl@95127 13f79535-47bb-0310-9956-ffa450edef68