Database: Raise the minimum required version of MySQL.

This raises the minimum version of MySQL required to run WordPress from 5.0 to 5.5.5.

MySQL 5.0 and 5.1 have long been unsupported and both reached end of life over 10 years ago. Combined usage for both versions sits at 0.4% of all WordPress sites.

Because 5.5 sits at just under 15% usage, 5.5 cannot be trimmed off at this time.

Of all sites running 5.5.x, 85% are running 5.5.5, and 100% are running 5.5.5 or higher. This makes it the logical landing spot.

Props johnbillion, sergeybiryukov, jorbin.
Fixes #60036.
Built from https://develop.svn.wordpress.org/trunk@57173


git-svn-id: http://core.svn.wordpress.org/trunk@56684 1a063a9b-81f0-0310-95a4-ce76da25c4cd

readme.html

@@ -52,7 +52,7 @@
 <h2>System Requirements</h2>
 <ul>
 	<li><a href="https://secure.php.net/">PHP</a> version <strong>7.0</strong> or greater.</li>
-	<li><a href="https://www.mysql.com/">MySQL</a> version <strong>5.0</strong> or greater.</li>
+	<li><a href="https://www.mysql.com/">MySQL</a> version <strong>5.5.5</strong> or greater.</li>
 </ul>
 
 <h3>Recommendations</h3>

wp-includes/version.php

@@ -16,7 +16,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '6.5-alpha-57172';
+$wp_version = '6.5-alpha-57173';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.
@@ -44,4 +44,4 @@ $required_php_version = '7.0.0';
  *
  * @global string $required_mysql_version
  */
-$required_mysql_version = '5.0';
+$required_mysql_version = '5.5.5';