Only match FIFOs by name, not everything
Only match FIFOs by name, not everything

Before this change we over-estimated IPC connectivity on Linux (at least) by
blindly assuming that everything named the same with opposing access was an IPC
channel.

With this change in place we only do that for FIFOs, which is how the comments
in the code say things should work.

walles/px,walles/px