Fix some issues pointed out by Coverity Scan
Make proper use of the va_copy macro
Add Matrix44 type
Implement CreatableList helper
This helper is used in the LinkingMgrMsg that we want to implement
Implement plClimbMsg
Implement plWarpMsg
This is pure evil  so we only allow admins to send this
Implement plLinkingMgrMsg
This message comes in when somebody does "Net.LinkToPlayersAge" and only admins should be able to do that. In CWE the args are handled by a helper class, but we don't care about dismantling the data.
Implement pfBackdoorMsg
Another message that is for admin use only. It allows us to properly execute python backdoors.