[Canvas] Agora 1.21. point release

1.21 point release with bugfixes and modules is available for download.
Two modules for SCADA systems and two web exploits this time.
While one SCADA module is unpatched in current official version, the
other is patchable, but we think is still usefull.

The exact list by now:
- Invensys Wonderware InFusion SCADA (and other products) Ax exploit.
- DATAC RealWin SCADA 1.06 Buffer Overflow Exploit. unpatched as of
07.11.2010
- DNET Live-Stats 0.8 Local File Inclusion. unpatched as of 07.11.2010
- OvBB v0.16a Local File Inclusion. unpatched as of 07.11.2010