I have been getting the message about storing un-encrypted svn passwords for ages on FreeBSD and Ubuntu. I finally thought I would look into how you store encrypted passwords.

-----------------------------------------------------------------------
ATTENTION! Your password for authentication realm:

<https://dev.sinodun.com:443> Sinodun Projects Subversion Repository

can only be stored to disk unencrypted! You are advised to configure
your system so that Subversion can store passwords encrypted, if
possible. See the documentation for details.

You can avoid future appearances of this warning by setting the value
of the 'store-plaintext-passwords' option to either 'yes' or 'no' in
'/home/jad/.subversion/servers'.
-----------------------------------------------------------------------

Lots of goggling later the best I could find was an article about gnome-keyring-daemon and subversion which mentions the need for libsvn_auth_gnome_keyring-1.so. A quick search found this was missing on my system. A moment of dumbness later I remembered make config and found the port config option needed.

re-installing the port unfortunately broke svn with the following message:

svn: E175002: OPTIONS of 'https://dev.sinodun.com/svn/projects': SSL handshake failed: SSL disabled due to library version mismatch (https://dev.sinodun.com)

Thanks to this that was quickly fixed by rebuilding neon:

sudo portupgrade -f neon*