cache_updater.php

Fixes #0000449: Category Permission Cache is calculated incorrectly on PHP5

INP-374

Fixes #0000327: Check Licensing and Installation Steps for External Links

INP-276

1. Bug #0000159: Prevent of Execution of System Files of files other, then "index.php" and "admin/index.php"

2. Adding DEFINED FULL_PATH security-check

INP-129

INP-183

1. Bug #0000182: In-Portal Security Checks and Updates (part 1).

2. No path in includes inside site configs, for fckeditor.php.

3. "download_license" step removed from install step presets.

INP-146

1. Fixes #0000189: Changes in Options for "Section Template" field for Sections.

2. Implemented not exactly the way as planned, because administrator can change "Parent Section" from "Content" (top category, where "Inherit from Parent" option in "Template" field not available) to it's child section, where this option should be available. As a result I always show "Inherit from Parent" option, but when administrator manually selects "Inherit from Parent" in "Template" field and "Content" in "Parent Section" field and tries to save changes, I show him an error about that.

INP-152

Releasing version 'branches/5.0.x' (copy from 'branches/RC')