[issue7523] add SOCK_NONBLOCK and SOCK_CLOEXEC to socket module

[Antoine Pitrou]

Antoine Pitrou <pitrou at free.fr> added the comment:

> @Antoine could you respond to msg97699, thanks.

Well my comments and the patch itself are outdated now that 2.7 is in bugfix mode. The socket implementation in 3.2 is slightly different, which means the patch should be updated (it isn't necessarily difficult to do so), and the accept() issue should be examined again.

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components:  -IO
nosy: +exarkun
stage: patch review -> needs patch

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