* Adds package that can configure using turnserver for jitsi-meet.

Activates http2 on the nginx host and uses the alpn send with the web requests to multiplex traffic to be served as web of proxied to the turn server.
It needs nginx at least v1.13.10.
Adds turncredentials module from Philipp Hancke, with small modification (all int values for hosts need to be strings/tostring()) in order to be able to use the module with prosody 0.11.

* Moves loading of stream after loading stream module (50-..).

* Leaves DISABLE_TCP_HARVESTER to be handled by jvb.

* Fixes comments.

* Properly detect first time coturn install and configure it.

* Handles upgrading from jetty serving web.

* Does not create jvb user if already exists.

* Fixes let's encrypt and adds turnserver handling.

* Enables use of turn server in config.js if available.

* Adds a check whether prosody config exists.

There are cases where deployments can still have configured prosody in the main prosody config in /etc/prosody.

Use ANDROID_ID:
https://developer.android.com/reference/android/provider/Settings.Secure#ANDROID_ID

This shouldn't be needed, as ConnectionService should take care of it, but we
suspect some devices don't do it since we got reports of people not hearing
users, and the problem went away when CS was disabled.

Fixes datachannels not working.

Fallback to the non-ConnectionService case for any error. Also, handle errors
when registering the phone account; Pixel C devices throw UnsupportedException.

Move call to reloadNow() on CONNECTION_FAILED to
the ./features/app/middleware to avoid importing higher order feature
from the lower level one.

Do not return anything from JitsiConnection.connect, because it's not
a promise and returns void. Doing so is confusing to the reader.

feat(thumbnailMenu):Change remoteControl item text

Pixel C devices have been seen crashing here, oh well.

While Fastlane recommends automagic screenshots, we cannot really do that since
we require a specific setup for a video call and so on.

ios: fix SDK build after dropping iOS 10

* Update lib-jitsi-meet and js-utils

Since we only support iOS 11, 32 bit architectures must not be built.

PostMessageTransportBackend and Transport, along
with the constants file they both use, were
moved int js-utils for jitsi-meet-spot.