syscall: refactor address APIs for deeper errno latching#3897

Merged

ggreenway merged 7 commits intoenvoyproxy:masterfrom venilnoronha:gh-3819-fix-address

Jul 27, 2018

+100-92

Commits on Jul 19, 2018

Commits on Jul 26, 2018

Address review comments
venilnoronha
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