/etc/apache2/mods-available/authz_svn.load is in libapache2-mod-svn 1.8.8-1ubuntu3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 | # Depends: dav_svn
LoadModule authz_svn_module /usr/lib/apache2/modules/mod_authz_svn.so
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