[master] Added ChangeLog entry for #4281.

ChangeLog

+1120.	[func]		marcin
+	Extended MySQL host data source to retrieve DHCPv4 and DHCPv6
+	options associated with hosts from a MySQL database.
+	(Trac #4281, git b8a306a27d1cae03f6bc5223c30806f5cd1b64f4)
+
 1119.	[func]		sar
 	Add debug logging to the classification tokens.  This uses
 	the loggers "kea-dhcp4.eval" and "kea-dhcp6.eval" to capture