I switched them to this:
SSLEngine on
SSLCertificateFile “C:\ProgramData\win-acme\httpsacme-v01.api.letsencrypt.org\www.d20celerity.net-crt.pem”
SSLCertificateKeyFile “C:\ProgramData\win-acme\httpsacme-v01.api.letsencrypt.org\www.d20celerity.net-key.pem”
SSLCertificateChainFile “C:\ProgramData\win-acme\httpsacme-v01.api.letsencrypt.org\ca-www.d20celerity.net-crt.pem”
Now, my apache does not start. It also seems that my error logs stopped updating some minutes ago.
EDIT: It seems that when I comment out the “Include conf/extra/httpd-ssl.conf” line, my error logs works again.
I will try instructions on https://www.sslforfree.com/ meanwhile.