Add blacklist function

setup/sql/upgrade-00025.sql

@@ -0,0 +1,17 @@
+# Header section
+# Define incrementing schema version number
+SET @schema_version = '25';
+
+# Create table to store global blacklist
+CREATE TABLE `blacklist` (
+  `email` varchar(255) NOT NULL,
+  PRIMARY KEY (`email`)
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;
+
+#Alter table campaigns
+ALTER TABLE `campaigns` ADD COLUMN `blacklisted` int(11) unsigned NOT NULL DEFAULT '0' AFTER `delivered`;
+
+# Footer section
+LOCK TABLES `settings` WRITE;
+INSERT INTO `settings` (`key`, `value`) VALUES('db_schema_version', @schema_version) ON DUPLICATE KEY UPDATE `value`=@schema_version;
+UNLOCK TABLES;