Infinite redirect loop on sourcegraph.com when accessing submodule

Created by: DolceTriade

• **Sourcegraph version: "Sourcegraph.com"

Steps to reproduce:

1. Go to https://sourcegraph.com/github.com/Unvanquished/Unvanquished/-/tree/libs/libRocket

Expected behavior:

1. Shows contents of directory

Actual behavior:

Redirect loop