Update credentialz for glome.

credentialz/credentialz.proto

@@ -590,6 +590,7 @@ message RotateHostParametersRequest {
     GenerateKeysRequest generate_keys = 4;
     AllowedAuthenticationRequest authentication_allowed = 5;
     AuthorizedPrincipalCheckRequest authorized_principal_check = 6;
+    GlomeRequest glome = 7;
   }
 }
 
@@ -600,6 +601,7 @@ message RotateHostParametersResponse {
     GenerateKeysResponse generate_keys = 3;
     AllowedAuthenticationResponse authentication_allowed = 4;
     AuthorizedPrincipalCheckResponse authorized_principal_check = 5;
+    GlomeResponse glome = 6;
   }
 }
 
@@ -683,6 +685,16 @@ message AuthorizedPrincipalCheckRequest {
 message AuthorizedPrincipalCheckResponse {
 }
 
+// Message setting glome parameters.
+message GlomeRequest {
+  bool enabled = 1;
+  string key = 2;
+  int32 key_version = 2;
+  string url-prefix = 3;
+}
+
+message GlomeResponse {
+}
 
 // A request to generate a list of public/private key pairs based on the given
 // key specification and return the list of generated public keys back.