Process Name Change Requests (CHNT message)

CHNT messages are now supported, which allows passenger name changes to be processed.

Sample message:

HDQRMVC
.QTSRM1V 250643
QTS1V MBL001
1AUCOIN/MELVIN
CHNT
1AUCOIN/MARTIN
VC7011Y27JUL PKBCLT HK1/0730 0926