ssh/terminal: add GetState and make ReadPassword work in raw mode.

GetState is useful for restoring the terminal in a signal handler.

R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/6990043
1 file changed
tree: 55a53fe0d712dee345eda3eb0af7b4d6554b35f8
  1. terminal.go
  2. terminal_test.go
  3. util.go