Change some errdetail() to errdetail_internal()

This prevents marking the argument string for translation for gettext,
and it also prevents the given string (which is already translated) from
being translated at runtime.

Also, mark the strings used as arguments to check_rolespec_name for
translation.

Backpatch all the way back as appropriate.  None of this is caught by
any tests (necessarily so), so I verified it manually.

src/backend/catalog/dependency.c

@@ -1193,14 +1193,14 @@ reportDependentObjects(const ObjectAddresses *targetObjects,
 					(errcode(ERRCODE_DEPENDENT_OBJECTS_STILL_EXIST),
 					 errmsg("cannot drop %s because other objects depend on it",
 							getObjectDescription(origObject, false)),
-					 errdetail("%s", clientdetail.data),
+					 errdetail_internal("%s", clientdetail.data),
 					 errdetail_log("%s", logdetail.data),
 					 errhint("Use DROP ... CASCADE to drop the dependent objects too.")));
 		else
 			ereport(ERROR,
 					(errcode(ERRCODE_DEPENDENT_OBJECTS_STILL_EXIST),
 					 errmsg("cannot drop desired object(s) because other objects depend on them"),
-					 errdetail("%s", clientdetail.data),
+					 errdetail_internal("%s", clientdetail.data),
 					 errdetail_log("%s", logdetail.data),
 					 errhint("Use DROP ... CASCADE to drop the dependent objects too.")));
 	}
@@ -1212,7 +1212,7 @@ reportDependentObjects(const ObjectAddresses *targetObjects,
 							   "drop cascades to %d other objects",
 							   numReportedClient + numNotReportedClient,
 							   numReportedClient + numNotReportedClient),
-				 errdetail("%s", clientdetail.data),
+				 errdetail_internal("%s", clientdetail.data),
 				 errdetail_log("%s", logdetail.data)));
 	}
 	else if (numReportedClient == 1)

src/backend/commands/user.c

@@ -567,7 +567,7 @@ AlterRole(AlterRoleStmt *stmt)
 	Oid			roleid;
 
 	check_rolespec_name(stmt->role,
-						"Cannot alter reserved roles.");
+						_("Cannot alter reserved roles."));
 
 	/* Extract options from the statement node tree */
 	foreach(option, stmt->options)
@@ -922,7 +922,7 @@ AlterRoleSet(AlterRoleSetStmt *stmt)
 	if (stmt->role)
 	{
 		check_rolespec_name(stmt->role,
-							"Cannot alter reserved roles.");
+							_("Cannot alter reserved roles."));
 
 		roletuple = get_rolespec_tuple(stmt->role);
 		roleform = (Form_pg_authid) GETSTRUCT(roletuple);

src/backend/utils/adt/acl.c

@@ -5226,7 +5226,7 @@ get_rolespec_name(const RoleSpec *role)
 
 /*
  * Given a RoleSpec, throw an error if the name is reserved, using detail_msg,
- * if provided.
+ * if provided (which must be already translated).
  *
  * If node is NULL, no error is thrown.  If detail_msg is NULL then no detail
  * message is provided.
@@ -5247,7 +5247,7 @@ check_rolespec_name(const RoleSpec *role, const char *detail_msg)
 					(errcode(ERRCODE_RESERVED_NAME),
 					 errmsg("role name \"%s\" is reserved",
 							role->rolename),
-					 errdetail("%s", detail_msg)));
+					 errdetail_internal("%s", detail_msg)));
 		else
 			ereport(ERROR,
 					(errcode(ERRCODE_RESERVED_NAME),

src/backend/utils/adt/jsonfuncs.c

@@ -615,13 +615,13 @@ json_ereport_error(JsonParseErrorType error, JsonLexContext *lex)
 		ereport(ERROR,
 				(errcode(ERRCODE_UNTRANSLATABLE_CHARACTER),
 				 errmsg("unsupported Unicode escape sequence"),
-				 errdetail("%s", json_errdetail(error, lex)),
+				 errdetail_internal("%s", json_errdetail(error, lex)),
 				 report_json_context(lex)));
 	else
 		ereport(ERROR,
 				(errcode(ERRCODE_INVALID_TEXT_REPRESENTATION),
 				 errmsg("invalid input syntax for type %s", "json"),
-				 errdetail("%s", json_errdetail(error, lex)),
+				 errdetail_internal("%s", json_errdetail(error, lex)),
 				 report_json_context(lex)));
 }
 

src/common/jsonapi.c

@@ -1052,7 +1052,7 @@ report_parse_error(JsonParseContext ctx, JsonLexContext *lex)
 }
 
 /*
- * Construct a detail message for a JSON error.
+ * Construct an (already translated) detail message for a JSON error.
  */
 char *
 json_errdetail(JsonParseErrorType error, JsonLexContext *lex)