ssh/knownhosts: support hashed hostnames

Change-Id: I855a6542a2eb2ae1d223f03892c0f19da81a4f8d
Reviewed-on: https://go-review.googlesource.com/40532
Run-TryBot: Han-Wen Nienhuys <hanwen@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Adam Langley <agl@golang.org>
2 files changed