A big, fat commit with a shitload of internal changes. Not that much

visual changes:

- removed redundant files user.class.php, calendar.class.php
  and backend.class.php.
- converted *all* mysql queries to queries supported by the
  database abstraction layer.
- expanded the watchdog to record more information on what
  actually happened.
- bugfix: anonymous readers where not able to view comments.
- bugfix: anonymous readers could gain read-only access to
  the submission queue.
- bugfix: invalid includes in backend.php
- bugfix: invalid use of '$user->block'

and last but not least:

- redid 50% of the user account system

1 files changed, 2 insertions, 3 deletions

diff --git a/includes/database.inc b/includes/database.inc
index 3721fbd65..843cb270a 100644
--- a/includes/database.inc
+++ b/includes/database.inc
@@ -26,9 +26,8 @@ function db_query($query, $debug = false) {
   $qid = mysql_query($query);
 
   ### debug output (if required):
-  if ($debug || empty($qid)) {
-    print "<PRE>query: ". htmlspecialchars($query) ."<BR>error message: ". mysql_error() ."</PRE>";
-  }
+  if ($debug || empty($qid)) print "<PRE>query: ". htmlspecialchars($query) ."<BR>error message: ". mysql_error() ."</PRE>";
+  if (empty($qid)) watchdog(3, "error: ". mysql_error() ."<BR>query: ". htmlspecialchars($query) ."");
  
   ### return result from query: 
   return $qid;