CRangeList Hotlist

TO DO
•	(12/18/96): RangeToIMAPString does not convert ulLAST_MESSAGE to a "*", but instead represents it as its numerical value. Fix this function to print ulLAST_MESSAGE as a "*". Note that I am deferring this because the only way the resulting message range can fail is if there exists a UID > ulLAST_MESSAGE. There is only one such UID.