added a new property "PRI-text", which holds the PRI field in textual form (e.g. "syslog.info")
added alias "syslogseverity" for "syslogpriority", which is a misleading property name that needs to stay for historical reasons (and backward-compatility)
added doc on how to record PRI value in log file
enhanced signal handling in klogd, including removal of an unsafe call to the logging system during signal handling