afc8adc88f
PR go/59506 net: use DialTimeout in TestSelfConnect Backported from master repository. This avoids problems with systems that take a long time to find out nothing is listening, while still testing for the self-connect misfeature since a self-connect should be fast. With this we may be able to remove the test for non-Linux systems. Tested (on GNU/Linux) by editing selfConnect in tcpsock_posix.go to always return false and verifying that TestSelfConnect then fails with and without this change. Idea from Uros Bizjak. From-SVN: r206224
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