Merge branch 'feature/main/zt-rwlock.h' into 'main'

Include isc_rwlocktype_t type definition in zt.h

See merge request isc-projects/bind9!7376

Author: oerdnj

lib/dns/include/dns/zt.h

@@ -18,6 +18,7 @@
 #include <stdbool.h>
 
 #include <isc/lang.h>
+#include <isc/rwlock.h>
 
 #include <dns/types.h>