klist: Add a program that lists Kerberos tickets.
It's a clean-room reimplementation that mimics Windows 10 program's output format. It prints all the information that is available via KerbQueryTicketCacheMessage.
Also tested to work on Windows if dynamically linked + built with winegcc.
For further extension of the functonality, implementing KerbQueryTicketCacheEx{,2,3}Message is required.
Edited by Maxim Karasev