Remove twisted/python/_epoll.c

[vperic]

Our own epoll wrapper is not built on Python2.6+. As older Python versions are no longer supported, we can remove the module and instead use the implementation in the official library.

Attched patch removes mentions of it in twisted/topfiles/setup.py and a related private helper from twisted.python.dist. The _epoll module itself (t.p._epoll.{c,pyx}) and it's tests (t.test.test_epoll) have also been removed. Finally, t.internet.epollreactor has been changed to directly refer to the select module (rather than calling it _epoll) and a conditional import was removed.

[itamar]

Looks good; merge with a news file (a .misc is fine, since this change is not user visible in any way), and as usual only if buildbot passes on all platforms.

[vperic]

(In [35187]) Create branch remove-_epoll-5847

[vperic]

 Build results.

[itamar]

There's test failure on FreeBSD and some of the other non-Linux platforms.

[therve]

(In [37427]) Branching to 'remove-epoll-5847-2'

[therve]

This is back for review, builds here:  http://buildbot.twistedmatrix.com/boxes-supported?branch=/branches/remove-epoll-5847-2

[exarkun]

Thanks. I'm slightly concerned that the stdlib-based epoll implementation is broken under load (< http://twistedmatrix.com/pipermail/twisted-python/2013-March/026622.html>) but I guess it's easy to revert this change later if it turns out we want to restore our version of the bindings for some reason.

Apart from that, the builds look good. The news file is missing, though. Please fix that and merge.

[therve]

(In [37439]) Merge remove-epoll-5847-2

Authors: vperic, therve Reviewers: exarkun, itamar Fixes: #5847

Remove custom epoll bindings, the epoll reactor using stdlib version since python 2.6.