upgrade trac

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We are using a super old version of Trac.

There are many issues with it, and with its plugins.

I don't know if upgrading Trac would actually let us address any of those issues directly - commenters on this issue are encouraged to help build up a list of links to those things - but a more recent version would allow us to more productively work with the Trac team to get some of these things addressed.

[tomprince]

I made some notes about what would be required to upgrade track:
https://twistedmatrix.com/trac/wiki/Infrastructure/UpgradingTrac

[exarkun]

I think you did this.

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Someone did, that's for sure.