ssh/knownhosts: add file + linenumber for parse errors

Change-Id: Iddcb145ecd8a6b51c72ad3d77b242975baf4a5cf
Reviewed-on: https://go-review.googlesource.com/41210
Run-TryBot: Han-Wen Nienhuys <hanwen@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Sam Whited <sam@samwhited.com>
Reviewed-by: Han-Wen Nienhuys <hanwen@google.com>
1 file changed