(linux) make netstat test a bit more robust
(linux) make netstat test a bit more robust

skyshe/psutil,chjwang/psutil,google-code-export/psutil,djhaskin987/psutil,jucapj/psutil,tigerneil/psutil,stupidcache/psutil,chjwang/psutil,kiranvizru/psutil,end18/psutil,nmani1905/psutil,PFZheng/psutil,djhaskin987/psutil,vmolsa/psutil,google-code-export/psutil,Alwnikrotikz/psutil,end18/psutil,tigerneil/psutil,anfedorov/psutil,creativewild/psutil,AlanZatarain/psutil,creativewild/psutil,Alwnikrotikz/psutil,vmolsa/psutil,shiva21/psutil,shiva21/psutil,zhengzheng/psutil,end18/psutil,end18/psutil,djhaskin987/psutil,stupidcache/psutil,peter-hst/psutil,huson2012/psutil,kiranvizru/psutil,creativewild/psutil,kiranvizru/psutil,anfedorov/psutil,jucapj/psutil,skyshe/psutil,peter-hst/psutil,google-code-export/psutil,tigerneil/psutil,huson2012/psutil,skyshe/psutil,tigerneil/psutil,skyshe/psutil,huson2012/psutil,google-code-export/psutil,stupidcache/psutil,marmolu/psutil,nmani1905/psutil,marmolu/psutil,vmolsa/psutil,kiranvizru/psutil,PFZheng/psutil,vmolsa/psutil,djhaskin987/psutil,zhengzheng/psutil,AlanZatarain/psutil