net/http: Sync TimeoutHandler godoc with code.
net/http: Sync TimeoutHandler godoc with code.

TimeoutHandler was changed from "ns int64" to "dt time.Duration" on
Nov 30, 2011, but the godoc still refers to "ns".

R=golang-dev, bradfitz
CC=golang-dev
https://codereview.appspot.com/7031050

Committer: Ian Lance Taylor <87e9c6d529889242b7e184afb632328636553ab4@golang.org>

pombredanne/go-deleteme,gnanderson/go,gnanderson/go,dsriram/golang,tv42/old-go,gnanderson/go,dsriram/golang,tv42/old-go,gnanderson/go,apparentlymart/golang,pombredanne/go-deleteme,dsriram/golang,apparentlymart/golang,tv42/old-go,apparentlymart/golang,gnanderson/go,tv42/old-go,gnanderson/go,apparentlymart/golang,tv42/old-go,dsriram/golang,pombredanne/go-deleteme,dsriram/golang,dsriram/golang,pombredanne/go-deleteme,gnanderson/go,apparentlymart/golang,apparentlymart/golang,pombredanne/go-deleteme,pombredanne/go-deleteme,tv42/old-go,tv42/old-go,dsriram/golang,pombredanne/go-deleteme,apparentlymart/golang