add how to generate htpasswd

Gomatrixhosting testing

for matrix_nginx_proxy_proxy_synapse_metrics_basic_auth_key
resolves #1308

doc: how to export node and postgres sans grafana

Upgrade LinkedIn (0.5.0 -> 0.5.1)

Upgrade Heisenbridge (1.2.0 -> 1.2.1)

Seems like Ubuntu 18.04 does not have a dedicated `systemd-timesyncd` package, nor
does it include the `systemd-timesyncd` binary in the main `systemd` package.

Fixes https://github.com/spantaleev/matrix-docker-ansible-deploy/issues/1302

Regression since https://github.com/spantaleev/matrix-docker-ansible-deploy/pull/1192

Upgrade Element (1.8.5 -> 1.9.0)

Archlinux: remove package systemd-timesyncd

#1192 lead to the following error for me on Archlinux:
`TASK [matrix-base : Install host dependencies] *******************************************************************************************************************************
fatal: [matrix.***.de]: FAILED! => changed=false 
  msg: |-
    failed to install systemd-timesyncd: error: target not found: systemd-timesyncd`

There is no package called `systemd-timesyncd` on Archlinux. The service is installed with the [`systemd`](https://archlinux.org/packages/core/x86_64/systemd/) package itself.

I suggest removing the `systemd-timesyncd` from 2453876eb9/roles/matrix-base/tasks/server_base/setup_archlinux.yml (L7)

Support trusting the upstream server when it says the protocol is HTTPS