Go 1.4, setuid and linux's capabilities feature

This first came to me when I realized my newly compiled socks5dns spew error failing at dropping user privilege, since I run it on an arm machine I thought it was specific error for arm-based linux only. But then I checked this on an x86 and it still behave the same, after looking into some source codes apparently Go’s syscall.Setuid is not supported in linux. But hey, it was worked before, what the fuss?
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