src serve-git does not detect repos if CWD is a symlink

Created by: mattboehm

I have ~/repos symlinked to ~/Dropbox/repos. If I cd into ~/repos and run src serve-git, the server starts and appears to be hosting all of the files, but going to /v1/list-repos shows that no repos were detected. If I run the same command from the actual directory, it works and detects all of my repositories.