ec32b87 Auto-sync with upstream release/2.26/master

Authored and Committed by Carlos O'Donell 6 years ago
    Auto-sync with upstream release/2.26/master
    
    Upstream commit: d5c6dea2d5b4b5c64625c5386f6baec7bf2d89b3
    
    - malloc: Fix tcache leak after thread destruction (swbz#22111)
    - Add C++ versions of iscanonical (swbz#22235)
    
        
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