internal/iana: update protocol numbers
internal/iana: update protocol numbers

Change-Id: I88b1fac3419f3e655a11cb22050fcd9a9a6c6616
Reviewed-on: https://go-review.googlesource.com/19786
Reviewed-by: Ian Lance Taylor <87e9c6d529889242b7e184afb632328636553ab4@golang.org>

albertjin/golang-net,albertjin/golang-net,golang/net