* Frees cpAudio pointer in VOICEREC_deinit()
* Validates that the ship/wing can actually take orders, and validates that it can take the specific order in question before trying to send it.
* Reports the confidence of the voice match if DEBUG_ON is set.
* Various commenting changes based on the patch.
Not included: using confidence to discard voice matches that fall below a certain confidence level. I haven't noticed a tendency towards spurious matches, and I didn't want to introduce this without additional data, especially when it might cause problems for people with different accents (and ESPECIALLY without a setting to tweak the threshold value, which the original patch did not have; it was hardcoded at 90%).