Revert "Minor improvement to <ifaddrs.h> check"
Revert "Minor improvement to <ifaddrs.h> check"

This reverts commit 1f64e6bb11bdce7204af9fa02307dc18039ff7e1.

pch957/nanomsg,potatogim/nanomsg,reqshark/nanomsg,featherweight/ftw-kernel-nanomsg,gdamore/mamomsg,thisco-de/nanomsg,imp/nanomsg,smithed/nanomsg,wfxiang08/nanomsg,reqshark/nanomsg,JackDunaway/featherweight-nanomsg,gdamore/mamomsg,yan97ao/nanomsg,cosin2008/nanomsg.NET,smithed/nanomsg,modulexcite/nanomsg,tempbottle/nanomsg,imp/nanomsg,ttyangf/nanomsg,hyperfact/nanomsg,linearregression/nanomsg,ttyangf/nanomsg,krafczyk/nanomsg,simplestbest/nanomsg,snikulov/nanomsg,tempbottle/nanomsg,wirebirdlabs/featherweight-nanomsg,krafczyk/nanomsg,zerotacg/nanomsg,hyperfact/nanomsg,cosin2008/nanomsg.NET,kaostao/nanomsg,gdamore/mamomsg,wirebirdlabs/featherweight-nanomsg,TTimo/nanomsg,pch957/nanomsg,modulexcite/nanomsg,imp/nanomsg,yan97ao/nanomsg,smithed/nanomsg,krafczyk/nanomsg,pakozm/nanomsg,wirebirdlabs/featherweight-nanomsg,ttyangf/nanomsg,hyperfact/nanomsg,nirs/nanomsg,wfxiang08/nanomsg,nirs/nanomsg,TTimo/nanomsg,zerotacg/nanomsg,wfxiang08/nanomsg,pakozm/nanomsg,tempbottle/nanomsg,simplestbest/nanomsg,potatogim/nanomsg,TTimo/nanomsg,cosin2008/nanomsg.NET,snikulov/nanomsg,kaostao/nanomsg,TTimo/nanomsg,pakozm/nanomsg,linearregression/nanomsg,modulexcite/nanomsg,zerotacg/nanomsg,kaostao/nanomsg,thisco-de/nanomsg,ttyangf/nanomsg,featherweight/ftw-kernel-nanomsg,simplestbest/nanomsg,pch957/nanomsg,linearregression/nanomsg,reqshark/nanomsg,nirs/nanomsg,smithed/nanomsg,kaostao/nanomsg,yan97ao/nanomsg,JackDunaway/featherweight-nanomsg,potatogim/nanomsg,JackDunaway/featherweight-nanomsg