Bug Fix: Chnage to main.c checkFileCrc to not use /usr/bin/chkSum to avoid code hangup
if bootserver locks up.
- Changed the checkFileCrc routine to do perform file checksum, consistent with other CDS code.
- Added a file modification time check.
Sequence now :
- check file mod time
- If mod time changed, then read file and compute CRC
- If CRC changed, then report modified file
- If CRC did not change, file not modified so reset modtime