Set $pageroot to empty string when it has been entered as '/' to avoid the warning about it being incorrect.

Improve the warning message by including the values that do not match.

Author: bramley

public_html/lists/admin/index.php

@@ -712,7 +712,11 @@ function mb_strtolower($string)
 
 if (WARN_ABOUT_PHP_SETTINGS && !$GLOBALS['commandline']) {
     if (strpos(getenv('REQUEST_URI'), $pageroot.'/admin') !== 0) {
-        Warn($GLOBALS['I18N']->get('The pageroot in your config does not match the current locationCheck your config file.'));
+        Warn(s(
+            'The pageroot in your config "%s" does not match the current location "%s". Check your config file.',
+            $pageroot,
+            strstr(getenv('REQUEST_URI'), '/admin', true)
+        ));
     }
 }
 clearstatcache();

public_html/lists/admin/init.php

@@ -687,14 +687,15 @@
     $attachment_repository = $tmpdir;
 }
 
-if (!isset($pageroot)) {
+if (isset($pageroot)) {
+    if ($pageroot == '/') {
+        $pageroot = '';
+    }
+} else {
     $pageroot = '/lists';
-    $GLOBALS['pageroot'] = '/lists';
 }
-//# as the "admin" in adminpages is hardcoded, don't put it in the config file
+// as the "admin" in adminpages is hardcoded, don't put it in the config file
 $adminpages = $GLOBALS['pageroot'].'/admin';
-//# remove possibly duplicated // at the beginning
-$adminpages = preg_replace('~^//~', '/', $adminpages);
 
 $GLOBALS['homepage'] = 'home';