fix(http): flush the stream with an _end()
fix(http): flush the stream with an _end()

* Fixes #665

rjeli/luvit,luvit/luvit,bsn069/luvit,zhaozg/luvit,rjeli/luvit,bsn069/luvit,zhaozg/luvit,kaustavha/luvit,GabrielNicolasAvellaneda/luvit-upstream,bsn069/luvit,rjeli/luvit,rjeli/luvit,kaustavha/luvit,GabrielNicolasAvellaneda/luvit-upstream,GabrielNicolasAvellaneda/luvit-upstream,GabrielNicolasAvellaneda/luvit-upstream,luvit/luvit,kaustavha/luvit