The way httpd-ahssl.conf is shown now, it logs http as well as https connections. You should modify it to log only https connections since this is an SSL-only configuration file. This mod can be accomplished by adding the following to the end of the CustomLog configuration: expr=%{HTTPS}=="on"
CustomLog "${SRVROOT}/logs/ssl_request.log" \
"%t %h %{SSL_PROTOCOL}x %{SSL_CIPHER}x \"%r\" %b" env=HTTPS
Simple env=HTTPS should work also, I've made this change in httpd-ahssl.conf for 2.4.19.
Thanks for pointing this out.