A patch for mariadb to be able to work on moodles that have an azure one.

azure_mariadb_hacks.patch

diff --git a/lib/dml/mariadb_native_moodle_database.php b/lib/dml/mariadb_native_moodle_database.php
old mode 100644
new mode 100755
index 358a493647..c6f21e736e
--- a/lib/dml/mariadb_native_moodle_database.php
+++ b/lib/dml/mariadb_native_moodle_database.php
@@ -79,13 +79,10 @@ class mariadb_native_moodle_database extends mysqli_native_moodle_database {
      * @return array Array containing 'description' and 'version' info
      */
     public function get_server_info() {
-        $version = $this->mysqli->server_info;
-        $matches = null;
-        if (preg_match('/^5\.5\.5-(10\..+)-MariaDB/i', $version, $matches)) {
-            // Looks like MariaDB decided to use these weird version numbers for better BC with MySQL...
-            $version = $matches[1];
-        }
-        return array('description'=>$this->mysqli->server_info, 'version'=>$version);
+        $res = $this->mysqli->query("SELECT VERSION() AS VERSION;");
+        $res->data_seek(0);
+        $data = $res->fetch_array();
+        return array('description'=>$data["VERSION"], 'version'=>$data["VERSION"]);
     }
 
     protected function has_breaking_change_quoted_defaults() {