The Handbook states that the only difference between svnlite and devel/subversion from ports is that subversion can be used with Python and Perl libraries. But I don't see anything in the config files for using SASL.
svnlite --version
svn, version 1.10.0 (r1827917)
compiled on bikeshed-rgb-freebsd
Copyright (C) 2018 The Apache Software Foundation.
This software consists of contributions made by many people;
see the NOTICE file for more information.
Subversion is open source software, see http://subversion.apache.org/
The following repository access (RA) modules are available:
* ra_svn : Module for accessing a repository using the svn network protocol.
- handles 'svn' scheme
* ra_local : Module for accessing a repository on local disk.
- handles 'file' scheme
* ra_serf : Module for accessing a repository via WebDAV protocol using serf.
- using serf 1.3.9 (compiled with 1.3.9)
- handles 'http' scheme
- handles 'https' scheme
The following authentication credential caches are available:
* Plaintext cache in /root/.subversion
* GPG-Agent
svn --version
svn, version 1.13.0 (r1867053)
compiled Nov 4 2019, 16:13:07 on amd64-portbld-freebsd12.0
Copyright (C) 2019 The Apache Software Foundation.
This software consists of contributions made by many people;
see the NOTICE file for more information.
Subversion is open source software, see http://subversion.apache.org/
The following repository access (RA) modules are available:
* ra_svn : Module for accessing a repository using the svn network protocol.
- with Cyrus SASL authentication
- handles 'svn' scheme
* ra_local : Module for accessing a repository on local disk.
- handles 'file' scheme
* ra_serf : Module for accessing a repository via WebDAV protocol using serf.
- using serf 1.3.9 (compiled with 1.3.9)
- handles 'http' scheme
- handles 'https' scheme
The following authentication credential caches are available:
* Gnome Keyring
* KWallet (KDE)