unit_config_reader.php

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

Fixes #0000188: Find and remove all places where reffered to "/kernel" folder

INP-151

1. Fixes #0000140: Precautions when processing "SectionAdjustments" unit config option.

2. Fixed 2 warnings during section cache rebuild (related to processing of parent section of "in-portal:root" section).

INP-117

1. Fixes #0000171: Automatic Images Folder Cleaning.

2. Errors about array accessing problems from glob function during config cache rebuild.

3. Ability to add agents disabled by default.

INP-139

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