Differences between version 2003-03-18 and 2006-07-06
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Added Clockspeed records for the IMF music files of the following
Apogee games:

Blake Stone - Aliens of Gold
Blake Stone - Planet Strike
Body Count
Corridor 7
Spear of Destiny
Wolfenstein 3D

These additions were necessary in order to support seamless upgrades
from versions of the AdPlug library prior to 2.0, which had a
different default clockspeed rate for IMF files.