nassh 0.8.22.1: Update hterm, add ">crosh" host.

* Add special hostname ">crosh" to redirect to the crosh shell on Chrome OS,
  so that it's possible to open crosh in an app window.  This is a temporary
  fix that will have to change when Secure Shell moves to a v2 app.

Change-Id: I2e9132717b695bb74ff1ca2253e3fb4b514b91eb
Reviewed-on: https://chromium-review.googlesource.com/177951
Reviewed-by: Marvelous Marius <mschilder@chromium.org>
Tested-by: Robert Ginda <rginda@chromium.org>
nassh 0.8.22.2: Crosh polish.

* Display reconnect menu on non-zero exit status.
* Override ctrl/meta-shift-n to load a new nassh.html window rather than
  crosh.html, if available.
* Add nassh.html/crosh.html to web_accessible_resources to allow linking.

Change-Id: I59ab9d33532176e530afdc94ebafe860f0b45fea
Reviewed-on: https://chromium-review.googlesource.com/178084
Reviewed-by: Andrew de los Reyes <adlr@chromium.org>
Tested-by: Robert Ginda <rginda@chromium.org>
When initializing terminal, install the keyboard directly to x-srceen element.

Installing the keyboard to the document.body.firstChild does not work well
with spoken feedback enabled, as spoken feedback content script inserts a
div element at the beginin of the document's body, so the keyboard events
get eaten up.

BUG=chromium:216057
TEST=run secure shell with the spoken feedback enabled

Change-Id: I71732732b7c84b82e5a8528ab1d98f1fb01c5251
Reviewed-on: https://chromium-review.googlesource.com/177889
Reviewed-by: Robert Ginda <rginda@chromium.org>
Tested-by: Toni Barzic <tbarzic@chromium.org>
nassh 0.8.22.3: add support for new relay dance

Convert the old relay-host and relay-port prefs into a single
'relay-options' pref.  The 'relay-options' pref has always existed,
but never had a field in the connect dialog.

Old host/port preferences are merged into the options pref.

Add a canned configuration that corresponds to the correct settings
for google corp access on the new relay proxy front-end.

Fix the inifinite backoff.

Change-Id: I43de6205e5120d89a2b001bc5d242b453fba7401
Reviewed-on: https://chromium-review.googlesource.com/178097
Reviewed-by: Marvelous Marius <mschilder@chromium.org>
Tested-by: Robert Ginda <rginda@chromium.org>