[release-branch.go1.2] go-tour: use new socket interface

««« CL 100090043 / a8f927c18a86
go-tour: use new socket interface

LGTM=rsc
R=rsc
CC=golang-codereviews
https://golang.org/cl/100090043
»»»

TBR=rsc
CC=golang-codereviews
https://golang.org/cl/97030044
1 file changed