release.sh: can we avoid saving the password?

[benlk]

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ATTENTION!  Your password for authentication realm:

   <https://plugins.svn.wordpress.org:443> Use your WordPress.org login

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
'/Users/user/.subversion/servers'.
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Store password unencrypted (yes/no)?

Is there some option we can pass to the svn commands in release.sh that will automatically deny saving this password?