Some expected outputs are zero length

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We paint all demos in the Compet-N with a broad brushstroke and play them back according to the name of the directory they're located in. But not all demos should be played back with the same game version / IWAD.

This is evident in the output/ directory where there are a bunch of .txt files that are of zero size. Some of these are legitimate: for example, for ExM8 levels, no statistics data gets generated. However, there are some that should not be zero, and that are only zero because they've been generated from the wrong configuration. Examples are:

• Doom 1 demos that should be played back with the registered version IWAD, or with a different version to Doom 1.9.
• Final Doom demos recorded with the "alternate" version of the .exe that was included with the Id Anthology. This has different teleport behavior.

We need a separate configuration file with individual "overrides" for these misconfigured demos, so that we can play them back properly and test these different versions.

[fragglet]

There are also some, like tnt/nm100s/es18-301.zip, that are Final Doom demos recorded with Doom II's doom2.exe. Why? Who knows.