Issue #2062399 by kattekrab: Add Percona Server to list of supported MySQL alternative databases.

core/INSTALL.txt

@@ -23,6 +23,8 @@ Drupal requires:
   - MySQL 5.0.15 (or greater) (http://www.mysql.com/).
   - MariaDB 5.1.44 (or greater) (http://mariadb.org/). MariaDB is a fully
     compatible drop-in replacement for MySQL.
+  - Percona Server 5.1.70 (or greater) (http://www.percona.com/). Percona
+    Server is a backwards-compatible replacement for MySQL.
   - PostgreSQL 8.3 (or greater) (http://www.postgresql.org/).
   - SQLite 3.4.2 (or greater) (http://www.sqlite.org/).
 

core/lib/Drupal/Core/Database/Driver/mysql/Install/Tasks.php

@@ -27,7 +27,7 @@ class Tasks extends InstallTasks {
    * Returns a human-readable name string for MySQL and equivalent databases.
    */
   public function name() {
-    return t('MySQL, MariaDB, or equivalent');
+    return t('MySQL, MariaDB, Percona Server, or equivalent');
   }
 
   /**