adding wrapper for proxy header passing.

add a selection to the proxy editing page and passes that down into the templates.
Removed set_proxy_header from locations and moved to server directive. these will inherit down into locations if they are not defined there.

backend/migrations/20220309105452_proxy_header.js

@@ -0,0 +1,41 @@
+const migrate_name = 'proxy_header';
+const logger       = require('../logger').migrate;
+
+/**
+ * Migrate
+ *
+ * @see http://knexjs.org/#Schema
+ *
+ * @param   {Object} knex
+ * @param   {Promise} Promise
+ * @returns {Promise}
+ */
+exports.up = function (knex/*, Promise*/) {
+	logger.info('[' + migrate_name + '] Migrating Up...');
+
+	return knex.schema.table('proxy_host', function (proxy_host) {
+		proxy_host.integer('forward_proxy_header').notNull().unsigned().defaultTo(1);
+	})
+		.then(() => {
+			logger.info('[' + migrate_name + '] proxy_host Table altered');
+		});
+
+};
+
+/**
+ * Undo Migrate
+ *
+ * @param   {Object} knex
+ * @param   {Promise} Promise
+ * @returns {Promise}
+ */
+exports.down = function (knex/*, Promise*/) {
+	logger.info('[' + migrate_name + '] Migrating Down...');
+
+	return knex.schema.table('redirection_host', (table) => {
+		table.dropColumn('forward_proxy_header');
+	})
+		.then(function () {
+			logger.info('[' + migrate_name + '] proxy_host Table altered');
+		});
+};