MediaWiki:Config-json/qqq

Message if support for JSON is missing from PHP.
 * "Red Hat Enterprise Linux" (RHEL) and "CentOS" refer to two almost-identical Linux distributions. "5 and 6" refers to version 5 or 6 of either distribution. Because RHEL 7 likely will not include the PHP extension, do not translate as "5 or newer".
 * "The PHP extension" is the JSON extension included with PHP 5.2 and newer.
 * "The PECL extension" is based on the PHP extension, though excludes code some distributions have found unacceptable (see T49431).