Merge of "in-portal/branches/5.2.x@16691" to "in-portal/branches/5.3.x@16718".
Merge of "in-portal/branches/5.2.x@16388" to "in-portal/branches/5.3.x@16391".
Fixes INP-1495 - Use "array_replace_recursive" inside kSystemConfig class
Fixes INP-1481 - Add missing "svn:keywords" properties to PHP files (5.3.x)
Fixes INP-1159 - Create intermediate class to access /system/config.php file
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