add NN_IPV4ONLY to nn_symbols list
add NN_IPV4ONLY to nn_symbols list

Signed-off-by: Emil Renner Berthing <8b7431f25c4b2ad7f00afdf0b02f120128a9638d@mailme.dk>
Signed-off-by: Martin Sustrik <4dd6061be1198639e8b05ce4fd5ead7a0dcaa0f4@250bpm.com>

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