Undone changes in remoteaction_core_module. It is required that every module extends the base module class to ensure that all required subfunctions are present in every module.

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- Changed os updates from world to security advisories
- Added support for remote os update
- Added bind compatibility code
- Fixed bugs in cron compatibility

- Updated debian installation instructions.

- replace double-quotes with single-quotes whenever appropriate
- fix indentation

- replace double-quotes with single-quotes whenever appropriate

- reword some output
- fix typos

- replaced "exec('/etc/init.d/" calls with "exec($conf['init_scripts'] . '/' ."
- fixed output wording (typos and more...)

Temporary fix for: FS#1311 - Only first PHPINIDir directive honored per configuration tree - subsequent ones ignored