Installer fixed, prefixes improved, moved conn settings to connect() and some more improvements. MDL-14864

lib/setup.php

@@ -237,14 +237,7 @@ global $HTTPSPAGEREQUIRED;
 
 /// detect unsupported upgrade jump as soon as possible - do not change anything, do not use system functions
     if (!empty($CFG->version) and $CFG->version < 2007101509) {
-        echo '<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
-<html xmlns="http://www.w3.org/1999/xhtml" lang="en" xml:lang="en">
-<head>
-<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
-<title>'.get_string('error').'</title>
-</head><body>
-<div style="text-align: center; margin-top:5em;background-color:orange;">'.get_string('upgraderequires19', 'error').'</div>
-</body></html>';
+        print_error('upgraderequires19', 'error');
         die;
     }