[master] merge dyndb

4224.	[func]		Added support for "dyndb", a new interface for loading
			zone data from an external database, developed by
			Red Hat for the FreeIPA project.

			DynDB drivers fully implement the BIND database
			API, and are capable of significantly better
			performance and functionality than DLZ drivers,
			while taking advantage of advanced database
			features not available in BIND such as multi-master
			replication.

			Thanks to Adam Tkac and Petr Spacek of Red Hat.
			[RT #35271]

lib/dns/log.c

@@ -85,6 +85,7 @@ LIBDNS_EXTERNAL_DATA isc_logmodule_t dns_modules[] = {
 	{ "dns/crypto",		0 },
 	{ "dns/packets",	0 },
 	{ "dns/nta",		0 },
+	{ "dns/dyndb",		0 },
 	{ NULL, 		0 }
 };