tests: add test-net-connect-handle-econnrefused
tests: add test-net-connect-handle-econnrefused

test that tcp connections to invalid ports error out

bsn069/luvit,rjeli/luvit,luvit/luvit,connectFree/lev,AndrewTsao/luvit,boundary/luvit,boundary/luvit,GabrielNicolasAvellaneda/luvit-upstream,kaustavha/luvit,AndrewTsao/luvit,GabrielNicolasAvellaneda/luvit-upstream,kaustavha/luvit,sousoux/luvit,DBarney/luvit,rjeli/luvit,DBarney/luvit,AndrewTsao/luvit,DBarney/luvit,zhaozg/luvit,sousoux/luvit,rjeli/luvit,sousoux/luvit,sousoux/luvit,boundary/luvit,boundary/luvit,DBarney/luvit,connectFree/lev,bsn069/luvit,rjeli/luvit,GabrielNicolasAvellaneda/luvit-upstream,luvit/luvit,boundary/luvit,boundary/luvit,GabrielNicolasAvellaneda/luvit-upstream,kaustavha/luvit,zhaozg/luvit,sousoux/luvit,sousoux/luvit,bsn069/luvit