Backed out changeset 10d66191e16a because commit message fail. r=we-need-hooks
Bug 1065303 - Prepare autocomplete.xml/UnifiedComplete for adding new special result types and heuristics. r=mak

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extra : transplant_source : %147%8B%E3sN%BC%9B%25%8CR%C2%A5%D1i9%14%B9%7B%F5