/etc/apache2/sites-enabled/svn.three-dimensional.net.conf:
# svn.three-dimensional.net
<VirtualHost 82.103.138.183:443>
        SSLEngine On
        SSLCertificateFile /etc/ssl/certificates/apache2_default.pem
        ServerName svn.three-dimensional.net
        CustomLog /var/log/apache2/svn.three-dimensional.net.log combined
        <Location />
                Order allow,deny
                Allow from all
                DAV svn
                SVNParentPath /home/subversion
                AuthzSVNAccessFile /etc/subversion/public-svn-authzfile
                Satisfy Any
                Require valid-user
                AuthType Basic
                AuthName "three-dimensional.net Subversion Repository"
                AuthUserFile /etc/subversion/passwd
        </Location>
</VirtualHost>

/etc/subversion/public-svn-authzfile:
[groups]
owner = michiel
mvblog = michiel, leonieke, sofie, fboender
ambernet = sjk, michiel

[/]
@owner = rw
* = r

[mvblog:/]
@mvblog = rw
* = r

[ambernet:/]
@ambernet = rw
* = r

[michiel:/]
michiel = rw
* =