relative url with base url

so it appears creating a link as so

 [foo](/bar)

creates this url

 https://bitbucket.org/bar

in a wiki however this is actually a little annoying, it'd be nice if we could set a base url, in wiki settings, for relative urls, perhaps with some templating so that I could the original pattern would resolve (in my case) to

 https://bitbucket.org/xenoterracide/lm/wiki/bar

This is basically based on the idea that the relative url should be based on where the repository is deployed to, not the domain root. But I can see some people wanting it to be based on the domain root, so making it a configuration at the top of the wiki...