logKext should support rolling over logfiles

[GoogleCodeExporter]

LogKext should periodically roll over logfiles.

Benefits:
1) Save disk space
2) Makes reading logfile easier
3) Storage of logfiles is more sane, doesn't cause encryption problems

Drawbacks:
1) Increases complexity (decrypt, compress, encrypt?  what if key has changed?)
2) Possibly doesn't decrease logfile size if encrypted
3) How can use read rolled over logfiles?  Need to improve logKextClient with 
generic decryptor

Original issue reported on code.google.com by drspring...@gmail.com on 26 Aug 2008 at 1:21