removed Volkov voices which is actually Romanov from RA2

fixes #3190
removed RA ShipVoice which is identical to VehicleVoice
Red Alert AI configuration

building >1 production buildings is bogus as it has no benefit
generic names that describe the build order not fake personality
removed Volkov entirely as more permission problems arised

- unknown source for weapon sounds
- icon borrowed from APB without asking for permission
fixes #3198 by catching the null references completely
Merge pull request #3217 from pchote/psydev-fixup

D2K / C&C updates
Merge pull request #3218 from Mailaender/observer-stats-nre

Don't crash observing clients when allied tech centers get destroyed.
Merge pull request #3203 from Mailaender/bogus-ai-settings

Removed some non-sense from the Red Alert AI configuration
Merge pull request #3194 from Mailaender/ra-voice-cleanup

Removed Romanov ripped from RA2 and redundant voice definitions
Remove server pinging.