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Matt Mackall authored
Before: hgweb made it possible to download file content with a content type
detected from the file extension. It would serve .html files as text/html and
could thus cause XSS vulnerabilities if the web site had any kind of session
authorization and the repository content wasn't fully trusted.

Now: all files default to "application/binary", which all important
browsers will refuse to treat as text/html. See the table here:

https://code.google.com/p/browsersec/wiki/Part2#Survey_of_content_sniffing_behaviors
d06b9c55
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