Hi.

Why can't we use text file for wtmp? wtmp is just a log file, that is 
similar to other log files in system. We need to fix only last and ac 
programmes and libutil routines to work with text wtmp. I understand, 
that analyzing of wtmp records would be more complex, but wtmp would be 
in human readable form. And we would not need to trim hostname, because 
even in wtmpx the maximum hostname length is 256 bytes, and real max 
length is 1024 bytes.

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WBR, Vsevolod Stakhov