There are a few things that go wrong.

• SSL certificate is deleted even though it's perfectly valid still (since the original cert was also for example.com and www.example.com just in reverse order)
• The ssl-redirect.conf is not modified to remove references to the now deleted certificate
• include /etc/nginx/ssl/casacherda.nl; is kept in the vhost config which also references the deleted certificate
• ssl-redirect.conf is incorrectly modifed to redirect .example.com and .www.example.com for https redirect
• ssl-redirect.conf is incorrectly modified to redirect .example.com to example.com (need to test this again to see what exactly happens)

End result is broken nginx configuration and broken website. Some side-effects are mentioned (removing the SSL certificate) but other (leaving a broken nginx configuration still referencing those certs) are not and I would also expect the ssl-redirect.conf to be left in a correct state redirecting the correct domains as if it was created using www.example.com.

After some manual intervention and cleanup it can be made working again obviously but I would like to have Ploi do it right in the first place :D