* Encryption:

- PRS is now able to encrypt/decrypt itself on request. What you
have to do is just encrypt it with a secret key (using tools
available in the "encryption/" directory), put the encrypted
file on a remote server and request it by passing it your secret
key using HTML POST method (see the "post.html" file). It is
a ugly/lame/experimental feature, so take it as a PoC and play
with it :-) Do not hesitate to send me ideas or patches!

* Self-recovery:

- PRS can now host itself in another PHP script on the server to
be able to self-restore itself at script execution time. Noisy
game though, so think twice before playing it :-)

* Crontab:

- Added crontab management when available.

* PHP:

- Now take in account "open_basedir" PHP configuration variable.
- PHP Exec* functions wrapper debug and optimization.

* Other:

- Now take in account the safe mode's variable "safe_mode_exec_dir".
- Added some information at the page top (exec method, FS
exploration method, PHP safe mode, storage method (cookies/script)).
- Again some fixes for runtime magic quotes.
- Some file size calculation fixes (when "filesize()" function is
disabled).
- Code cleaning.