Improve exception messages

Author: peterdettman

crypto/src/crypto/tls/CertificateStatus.cs

@@ -95,7 +95,7 @@ protected static bool IsCorrectType(byte statusType, object response)
             case CertificateStatusType.ocsp:
                 return response is OcspResponse;
             default:
-                throw new ArgumentException("unsupported value", "statusType");
+                throw new ArgumentException("unsupported CertificateStatusType", "statusType");
             }
         }
     }

crypto/src/crypto/tls/CertificateStatusRequest.cs

@@ -88,7 +88,7 @@ protected static bool IsCorrectType(byte statusType, object request)
             case CertificateStatusType.ocsp:
                 return request is OcspStatusRequest;
             default:
-                throw new ArgumentException("unsupported value", "statusType");
+                throw new ArgumentException("unsupported CertificateStatusType", "statusType");
             }
         }
     }

crypto/src/crypto/tls/ServerName.cs

@@ -98,7 +98,7 @@ protected static bool IsCorrectType(byte nameType, object name)
             case Tls.NameType.host_name:
                 return name is string;
             default:
-                throw new ArgumentException("unsupported value", "name");
+                throw new ArgumentException("unsupported NameType", "nameType");
             }
         }
     }