Bump minimum required MySQL Version to 5.5.8

Bug: T161232
Change-Id: I5f7d08ad7e58ce89c9fd766f0ac45fa996bf6a44

INSTALL

@@ -8,7 +8,7 @@ Starting with MediaWiki 1.2.0, it's possible to install and configure the wiki
 Required software:
 * Web server with PHP 5.5.9 or higher.
 * A SQL server, the following types are supported
-** MySQL 5.0.3 or higher
+** MySQL 5.5.8 or higher
 ** PostgreSQL 8.3 or higher
 ** SQLite 3.3.7 or higher
 ** Oracle 9.0.1 or higher

RELEASE-NOTES-1.30

@@ -5,6 +5,10 @@ THIS IS NOT A RELEASE YET
 MediaWiki 1.30 is an alpha-quality branch and is not recommended for use in
 production.
 
+=== MySQL version requirement in 1.30 ===
+As of 1.30, MediaWiki now requires MySQL 5.5.8 or higher (see Compatibility
+section).
+
 === Configuration changes in 1.30 ===
 * The "C.UTF-8" locale should be used for $wgShellLocale, if available, to avoid
   unexpected behavior when code uses locale-sensitive string comparisons. For
@@ -147,7 +151,7 @@ Oracle and Microsoft SQL Server.
 
 The supported versions are:
 
-* MySQL 5.0.3 or later
+* MySQL 5.5.8 or later
 * PostgreSQL 8.3 or later
 * SQLite 3.3.7 or later
 * Oracle 9.0.1 or later

includes/installer/MysqlInstaller.php

@@ -51,7 +51,7 @@ class MysqlInstaller extends DatabaseInstaller {
 
 	public $supportedEngines = [ 'InnoDB', 'MyISAM' ];
 
-	public $minimumVersion = '5.0.3';
+	public $minimumVersion = '5.5.8';
 
 	public $webUserPrivs = [
 		'DELETE',