rsyslog work log 35

Yesterday's rsyslog work log: 2008-02-20 - created new class ctok_token - created some notes on powertop and imfile - basic implementation of expression parser parsing done - improved ABNF a bit - added support for C-like inline comments (/* comment... */) - created design diagram for expression execution - created var class out of property_t - changed rsCStrDestruct() to use the new interface conventions - $MainMessageQueueDiscardSeverity can now also handle textual severities (previously only integers) - bugfix: message object was not properly synchronized when the main queue had a single thread and non-direct action queues were used - added vmop class (stage for expression execution) - added "contains" and "startwith" comparison operations - defined initial set of opcodes - created initial vmprg class - used new classes in expr.c - begun expr compile process, first steps done