[2565] Specify parameter kind in exception messages

src/lib/dns/rrclass.cc

@@ -33,7 +33,7 @@ namespace dns {
 RRClass::RRClass(const std::string& class_str) {
     if (!RRParamRegistry::getRegistry().textToClassCode(class_str, classcode_)) {
         isc_throw(InvalidRRClass,
-                  "Unrecognized RR parameter string: " + class_str);
+                  "Unrecognized RR class string: " + class_str);
     }
 }
 

src/lib/dns/rrtype.cc

@@ -34,7 +34,7 @@ namespace dns {
 RRType::RRType(const std::string& type_str) {
     if (!RRParamRegistry::getRegistry().textToTypeCode(type_str, typecode_)) {
         isc_throw(InvalidRRType,
-                  "Unrecognized RR parameter string: " + type_str);
+                  "Unrecognized RR type string: " + type_str);
     }
 }