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Fix remote code execution vulnerability #1

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SmartCookie as well as SerialCookie are vulnerable to code injection in python2.
Cookie.Cookie maps to Cookie.SmartCookie.
For example, the following cookie header would shutdown your server:
Cookie: foo="cposix\012_exit\012p1\012(I1\012tp2\012Rp3\012."

SmartCookie as well as SerialCookie are vulnerable to code injection in python2.
Cookie.Cookie maps to Cookie.SmartCookie.
For example, the following cookie header would shutdown your server:
Cookie: foo="cposix\012_exit\012p1\012(I1\012tp2\012Rp3\012."
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