Another batch with a lot of internal updates, yet no visual changes to the
site:

- watchdog (rewrite):
   + the collected information provides more details and insights
     for post-mortem research
   + input limitation
- database abstraction layer:
   + mysql errors are now verbose and is no longer displayed in a
     browser - fixes a possible security risk
- admin.php:
   + updated watchdog page
   + fixed security flaw
- diary.php:
   + fixed nl2br problem
- themes:
   + fixed comment bug in all 3 themes.
- misc:
   + renamed some global variables for sake of consistency:
      $sitename  -->  $site_name
      $siteurl   -->  $site_url
   + added input check where (a) exploitable and (b) possible
   + added input size check
   + various small improvements
   + fixed various typoes

... and much, much more in fact.

- Fixed quote bug in the comment tracker.
  (suggestion UnConeD)
- Added anchors to comment links to easy comment navigation.
  (suggestion UnConeD)
- Fixed duplicate `you voted' after moderating a story.
  (suggestion UnConeD)
- Fixed quote bug in administration center.
- Expanded user administration with timezone information.
- Improved the theme system by eliminating the "preview" function.
  Let's not make the system more complex then it ought to be.
- Refined watchdog administration.
- ...

username: anything
password: mOo!

- fixed a bug in check_input: html stripping was not 100% correct.
- fixed a bug in account.php: the confirmation url is now correct.
- improved error checking + security in diary.php.
- fixed a bug in the html code of theme zaphod.
- improved the date handling: always call format_date().
- expanded account information in administration pages.
- added a new variable $siteurl to ./includes/config.inc.
- added comment moderation to theme zaphod.
- "alter table users add timezone varchar(8);"

- !!! added new timezone feature !!! :o)

This significant commit fixes 99% of all known bugs and improves drop.org
by means of better security checks in order to avoid malicious behavior.
In addition, quite some code has been fine-tuned.

However, as a result, every theme will require a small update ...

- no comment

A bunch of internal changes:
 - better organisation of include files
 - renamed a few function to make more sense
 - small bugfix in the user account registration
 - ...

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

- Added a basic implementation of comment moderation
- Updated and renamed my 2 themes: I removed redundant boxes and tried to
  work towards simplicity.
- Disabled the other themes as they are broken (I gave you sufficent time
  to update them).
- Removed redundant files.
- Added security checks with regard to the usage of HTML tags.

Over the last 2 days I redid and reorganized an afwul lot of code and
made quite a lot of additions.   The most remarkable addition is the
diary server, which I slapped together in less then 40 minutes.   Most
of the other changes are however `unvisible' for the user but add much
value to a better maintainability from a developer's objective.  Like
always, I fixed quite a number of small bugs that creeped into the code
so we should have a bigger, better and more stable drop.org.

Unfortunatly, some theme update _are_ required:


REQUIRED THEME UPDATES:
=======================

* use format_username() where usernames are used
* use format_date() where timestamps/dates are used
* use format_email() where e-mail addresses are displayed
* use format_url() where url are displayed
* replace 'formatTimestamp' with format_date
* replace 'morelink_*' with 'display_morelink'

[most of these functions are in function.inc or template.inc]

___PLEASE___ (<- this should get your attention ;) update your themes
as soon as possible - it only takes 30 min. to get in sync with the
other themes.  Don't start whining about the fact you don't know what
to change ... either eat the source cookie, or ask me to elaborate on
a few changes.  Just let me know what's puzzling you and I'll try to
help you out!


TODO LIST FOR NEXT WEEK
=======================
* Add checks for max. text length in textarea's?  Is there an HMTL
  attribute for this or ...?
* Comment moderation + mojo
* Edit/admin user accounts: block, delete, change permissions, ...
* E-mail password, change password, change e-mail address -> extra
  checks and routines to validate such `special' changes.
* Input checking - input filter: bad words, html tags, ...

A really BIG, BIG UPDATE, after two straight days of nothing but code
and sleep, new stuff is finally in drop.org.  This is a quite large
and wide-ranging update, which affects almost all of the system files
in one way or another.  I fixed quite a lot of bugs and added quite a
lot of new features, mostly administrative tools as these were really
lacking.  It's far from finished but it's a start ...