cherry-picked the basic syslog_decoder testcase from the old syslog
parser branch
enabled a check to make sure that malformed syslog messages get discarded
it would be nice if the example configuration for syslog_decoder
actually rendered
init checkin of a RFC5424 parser to read syslog network messages
RFC5424 syslog decoder working for samples now
fixed the sd-param block
all captures appear to be working now Example 3 in RFC5424