SERVER_SOFTWARE identifier for twisted.web2 is incorrectly formatted

New submission from thijs <[email protected]>:

When I print the 'request' object from a twisted.web2 server, it shows that {{{SERVER_SOFTWARE}}} is defined like:

{{{
'SERVER_SOFTWARE': 'Twisted/8.2.0 TwistedWeb/[twisted.web2, version 8.2.0]'
}}}

Which should be something like:

{{{
'SERVER_SOFTWARE': 'Twisted/8.2.0 TwistedWeb/8.2.0'
}}}

Only tested this with twisted.web2 but could be a problem in twisted.web as well?

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Type     : defect
Component: web2
Keywords : 
Priority : normal
Nosy     : thijs
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http://twistedmatrix.com/trac/ticket/3870