When turned on, this option will allow validating Subversion's repository URLs only up to the first `$` sign, that is, up to the first encountered variable.
For example, the repository URL `https://hudson.dev.java.net/svn/hudson/trunk/hudson/plugins/$PLUGIN`, which validation raises an error since `$PLUGIN` can't be resolved at validation-time, would be successfully validated as `https://hudson.dev.java.net/svn/hudson/trunk/hudson/plugins/`. Also, credential would be entered for `https://hudson.dev.java.net/svn/hudson/trunk/hudson/plugins/` rather than for the complete URL.