added tutorial for creating a TLS-secured syslog infrastructure
rewritten omusrmsg to no longer fork() a new process for sending messages
this caused some problems with the threading model, e.g. zombies. Also,
it was far less optimal than it is now.
bugfix: machine certificate was required for client even in TLS anon mode
Reference: http://bugzilla.adiscon.com/show_bug.cgi?id=85
The fix also slightly improves performance by not storing certificates in
client sessions when there is no need to do so.
bugfix: RainerScript syntax error was not always detected