USN-8952-3: Tornado regression
USN-8952-2 fixed a regression in Tornado that broke static file serving for applications that subclass Tornado's StaticFileHandler, such as Jupyter. Unfortunately, that update's incomplete fix could introduce a regression by rejecting symlinks into system directories like /usr/share, which distribution packages use for their JavaScript and fonts, causing web UIs to return 403 errors. This update fixes the problem. We…
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