resp maybe None when pre_request raise exceptions
Support for python config file option in paster

It is now possible to specify a file with "config" as an application
configuration key in a paste deploy configuration file. This allows
paster applications to use the full range of gunicorn settings even
when using paste/pserve rather than gunicorn_paster.

Fixes #540.
typo
typo
Merge pull request #583 from pypeng/resp-maybe-none

resp maybe None when pre_request raises exceptions
small tweak of 53c4484

since timeout patch affect only select call,
it is better to not change self.timeout.