http://bugs.winehq.org/show_bug.cgi?id=18454
--- Comment #7 from Bruno Jesus 00cpxxx@gmail.com --- I agree with everything you said and I think there are only benefits. Since you are the original author that introduced it for OSX would you mind sending the patch to make it less OS strict?
The discussion about enabling SO_REUSEADDR in all sockets belongs to bug 26031 and I still think it would be valid as seen in http://bugs.winehq.org/attachment.cgi?id=47020&action=diff (which fixes the bug).