net/rpc: fix inconsistency in documentation of Service.Register Falsely claimed an old, no longer true condition that the first argument must be a pointer. Fixes issue 6697
net/rpc: fix inconsistency in documentation of Service.Register
Falsely claimed an old, no longer true condition that the first argument
must be a pointer.
Fixes issue 6697

R=golang-codereviews, bradfitz
CC=golang-codereviews
https://codereview.appspot.com/53480043

pombredanne/go-deleteme,pombredanne/go-deleteme,pombredanne/go-deleteme,tv42/old-go,tv42/old-go,pombredanne/go-deleteme,pombredanne/go-deleteme,tv42/old-go,tv42/old-go,pombredanne/go-deleteme,tv42/old-go,pombredanne/go-deleteme,tv42/old-go,tv42/old-go