Vehicle Depot 2 and three need two liquid inputs

Issue description

Vehicle Depot 2 and vehicle Depot 3 offer the option to feed inputs via belts/pipes. Hydrogen powered vehicles need hydrogen as a production resource and diesel powered vehicles need diesel for production. The Depot however, has only one liquid input.
If you are using mixed vehicle fleets you are forced to either truck in whatever fuel resource is needed or destroy/rebuild the pipe input if you need to switch build vehicle type.

Reproduction steps

1. Build a vehicle Depot 2/3
2. Unable to attach input pipes for diesel and hydrogen simultaneously

Game version and build number

v0.6.3a(b333)

Operating system

Windows

one workaround is to put a connector on the liquid input (ie, connect two pipes to the input), and it'll get either diesel or hydrogen.

Thank you for the tip. That is indeed the workaround I'm using at the moment.