Fix for #404

[asvetlov]

Don't pass ssl certivicate error to loop.call_exception_handler()
Handle ssl.CertificateError only because ssl.SSLError may be raised not only on connection establishment.

@1st1 please take a look

[asvetlov]

Fixes #404

[1st1]

Updating _FATAL_ERROR_IGNORE worries me: I don't think I understand all consequences of this PR. Could you please elaborate more?

[asvetlov]

_FATAL_ERROR_IGNORE is a tuple of exceptions which doesn't generate noisy loop.call_exception_handler() if connection cannot be established (see https://github.com/python/asyncio/blob/master/asyncio/selector_events.py#L633) for usage example.
ssl.CertificateError goes to this category -- it could be raised only at connecting stage.
The exception still is thrown to outer code but not logged unless debug mode is disabled.

[1st1]

Makes sense. Would you be able to write a unittest for this?

[1st1]

@asvetlov If you want this in 3.6.1 you need to add a unittest and resubmit this PR to python/cpython today.

[AraHaan]

@1st1 ok, so 3.6.1 is going out after today? btw would it also include the latest version of zlib as well because it has updated a to version above 1.2.8 this year to fix bugs and stuff.

[1st1]

@1st1 ok, so 3.6.1 is going out after today? btw would it also include the latest version of zlib as well because it has updated a to version above 1.2.8 this year to fix bugs and stuff.

Yes. Re zlib - not sure, please check on GH or bugs.python.org or python-dev mailing list.

[AraHaan]

hmm, from the looks on http://svn.python.org/projects/external/ I only see it having zlib v1.2.3 But I could have sworn python 3.6.0 was using 1.2.8. Will look at bugs.python.org or the python-dev irc channel.

[AraHaan]

@1st1 It looks like this repo was not marked as Read Only in it's settings to disable (I think it disables) the new issue / Pull Request buttons. Might want to do it explicitly in case someone does not read the readme in the redirect branch.

[decaz]

@asvetlov are you going to resubmit this PR to python/cpython ? I hope it's not abandoned.