References used to create this post:
- https://www.digitalocean.com/community/tutorials/how-to-configure-webdav-access-with-apache-on-ubuntu-12-04
- http://how-to.linuxcareer.com/webdav-server-setup-on-ubuntu-linux
- https://www.howtoforge.com/webdav_with_ssl_and_two_factor_authentication