remove call to exec() and replace it by alternative functions

The exec() function is usually disabled in most hosted environments,
because of security concerns. Furthermore the call to 'whoami' won't
work on Windows servers running PHP, so we should use a more portable
way of determining the current user's name.

Yes, people should usually avoid Windows as a server system OS, but
nevertheless there are PHP binaries for Windows, too, so we should
try to support that as well.
Merge remote-tracking branch 'remotes/Thoronador/fix-php-user-info' into alix6-bugfixes
Update README

description for alix6-bugfixes
update copyright notice of Frogsystem 2
Merge pull request #97 from Thoronador/fix-fs2-copyright

update copyright notice of Frogsystem 2
add ifmodule for mod_rewrite

Signed-off-by: Sweil <mail@sweil.de>
fixed cimg link

Signed-off-by: Sweil <mail@sweil.de>
Merge branch 'alix6_neu' of github.com:Sweil/Frogsystem-2 into alix6-bugfixes
fixed wrong lang-text references

Signed-off-by: Sweil <mail@sweil.de>
Merge branch 'alix6-bugfixes' of github.com:Sweil/Frogsystem-2 into alix6-bugfixes
fixed bug with "new" version of jQuery

Signed-off-by: Sweil <mail@sweil.de>
fixed wrong var usage in fscode.php

Signed-off-by: Sweil <mail@sweil.de>
don't convert linebreaks with fscode disabled

Signed-off-by: Sweil <mail@sweil.de>
fehlende texte ergänzt

Signed-off-by: Sweil <mail@sweil.de>
update b8 to version 0.6.1

Class b8_storage_mysql does not get updated during this commit,
because our implementation already uses PDO_MySQL instead of
the old mysql API used by the offical b8 codebase's class and
the fix for the potential SQL injection is already included in
our PDO version.
fixed nasty bug which prevents captcha from working

Signed-off-by: Sweil <mail@sweil.de>
add missing English (US) language texts

This commit corresponds to the changes that were made to the
German language file in commit f7599de3af.
It also fixes a typo in the German template language file.
fix errors in English (US) language file
Merge pull request #100 from Thoronador/feature-language-en_US

add missing English (US) language texts
Merge pull request #99 from Thoronador/feature-b8-0.6.1-update

update b8 to version 0.6.1