Cleanup of servers/ssh-config commands and serverlist/sshconfig modules
Fix stream logging handler
Improve logging documentation, return registered handlers
Improve shell subcommand help processing
Fix stupid bug in previous commit
Add some common utility classes
Bump version slightly
Remove useless debug print
Validate script.exit value, allow boolean as value
Logfile improvements, systematic.logformats module and first parser
Minor logging enhancements
Change log iterator to support multiple concurrent iterators