Parser testing/replaceInternalLinks

1. which namespaces should support subpages? See Language.php
2. for a list of namespaces
3. default: only discussion ("talk") namespaces and user pages
4. allow subpages
5. 0=no subpages, 1=subpages

$wgNamespacesWithSubpages = array( -1 => 0, 0 => 0, 1 => 1, 2 => 1, 3 => 1, 4 => 0, 5 => 1, 6 => 0, 7 => 1 );