merged branch stealth35/sanitize_ext (PR #761)

Commits
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9229ef3 Removed useless code

Discussion
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[Ext] Removed useless code

All init hooks could be bypassed (just return `SUCESS`)
There is no `ini` entries and no globals
Phpinfo automatically get the version when `MINFO` is null
Twig don't work with PHP 4 (ref to `20010901`)