Relative reference to file for HelpUrl on an HDA

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Hey all, I'm working on an HDA which utilizes an on-disk python library and I was hoping I could use the same directory structure to house my help docs so I could update them without having to rebuild the node every time I update the help docs. I could run it on our web server, but I would prefer to make it available offline and harden it against service outages on our web server. Unfortunately, I cannot seem to get it to work. When I click the help button, nothing happens. Anyone know if this is possible or do I just need to setup a web server for it. Also, I need it to be relative as users may have different install directory paths for it.

Note: I have had to switch my HOUDINI_EXTERNAL_HELP_BROWSER env variable to true as something is broken in my Houdini installs that causes an infinite loop when I try to use Houdini's built in browser for them. Not sure if that has something to do with it or not though.
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