rsyslog work log 36

Yesterday's rsyslog work log: 2008-02-19 - added professional support options to doc set (also somthing that we need to have in order to be an alternative to syslog-ng) - added doc on how expressions will work - cleaned up the stringbuf Construct interface - did some cleanup on stringbuf calls - we now have much better interfaces and macros - moved config file code to its own file - finally made CONT_LINES in config the only standard support (the code contained code for other case, which were never executed by the preprocessor) - some include file cleanup - added ctok class (the config tokenizer) - done stage work to begin implement tokenizer - implemented initial tokenizer (stage work for expr parser) - begun implementation of expression parsing logic - implemented, simpstr, var, number in tokenizer - implemented function in tokenizer