Merge pull request #60 from kusma/for-lra

various patches
Deleting some unused hosted files (thx @kusma)
Explaining why the files folder... !
It's not just about me...
Go to hell adobe
relative path is problematic for some scripts in subfolders
leftover crap, as the name says
Let's not crap out if we don't specify a user, find a random one
html entities until unicode is there
Moved recaptcha in the lib folder
remove some kind of php execution backdoor :-/
Merge pull request #61 from gasman/nobackdoorplz

Remove a PHP execution backdoor
Revert "Go to hell adobe"

This reverts commit 2383bc08adfd9fad952f4bace93409a948b683a6.
Copied what Adobe proposed as it does not look like it's working
piclens does not like redirects
get rid of getenv-calls

There's no point in explicitly loading these, when they can be
looked up in $_SERVER instead.
lookup server-variables in $_SERVER

This reduces some dependencies on register_globals
submit-logo.php: look up file-uploads in $_FILES

This reduces some dependencies on register_globals
submit-logo.php: cleanup indentation
rulez/update.php: look up session-level in $_SESSION

This reduces some dependencies on register_globals

While we're at it, turn it into a switch, to increase readability