[master] Finished merge of trac5053 (syslog facility)

ChangeLog

+1228.	[bug]		fdupont
+	Logging on syslog now uses correctly the given facility. If none
+	is given the default facility is local0, and with an unrecognized
+	value user (log4cplus default). The syslog openlog() ident
+	parameter is the program name.
+	(Trac #5053, git xxx)
+
 1227.	[func]		fdupont, tomek
 	Additional commands: version-get, build-report have been
 	implemented for DHCPv4, DHCPv6 and Control Agent