Log an event to the windows/unix system log
Description: Logs important events to the operating system log file. Use the following identifiers for log levels:
EMERGENCY - System is unusable
ALERT - Action must be taken immediately
CRITICAL - Critical conditions
ERROR - Error conditions
WARNING - Warning conditions
NOTICE - Normal, but significant, condition
INFO - Informational message
DEBUG - Debugging information
In Unix/Linux, this function is analagous to the syslog command, and logs to the 'messages' file
SystemLog "My Message" As "Warning"
SystemLog "My Message" As "Info"
Minimum version: 1.0