Add checks to login.php and cli to ensure database layout is up to date

- add check_db_version() to functions.inc.php
- add $min_db_version (needs to be updated at least before the release)
- call check_db_version in login.php, users/login.php and CLI - they'll
  error out if the database layout is outdated
- change setup.php to use check_db_version()



git-svn-id: https://svn.code.sf.net/p/postfixadmin/code/trunk@1853 a1433add-5e2c-0410-b055-b7f2511e0802

scripts/postfixadmin-cli.php

@@ -177,6 +177,9 @@ class PostfixAdmin {
             return false;
         }
 
+        # make sure global variables fron functions.inc.php end up in the global namespace, instead of being local to this function
+        global $version, $min_db_version;
+
         if (!require_once(PATH . '/common.php')) {
             $this->stderr("Failed to load " . PATH . '/common.php');
             return false;
@@ -190,6 +193,8 @@ class PostfixAdmin {
     public function dispatch() {
         $CONF = Config::read('all');
 
+        check_db_version(); # ensure the database layout is up to date
+
         if (!isset($this->args[0])) {
             $this->help();
             return;