* Add support for obtain ECDSA keys

* Replace matrix_ssl_lets_encrypt_use_ecdsa_keys for matrix_ssl_lets_encrypt_key_type

Fixes https://github.com/spantaleev/matrix-docker-ansible-deploy/issues/1498

Seems like Dendrite encourages serving both the Client and Federation
API at the same port.

Coming from Synapse and how things are done there, we have separate
ports. Using separate ports probably makes matrix-corporal (etc.)
integration easier, so separating the APIs by default probably makes
sense.

Fixes https://github.com/spantaleev/matrix-docker-ansible-deploy/issues/1468

Fixes https://github.com/spantaleev/matrix-docker-ansible-deploy/issues/1393

https://github.com/spantaleev/matrix-docker-ansible-deploy/pull/1311#issuecomment-945718866

for matrix_nginx_proxy_proxy_synapse_metrics_basic_auth_key
resolves #1308

when matrix_nginx_proxy_proxy_synapse_metrics is enabled

* add timeout param for nginx proxy

default value matrix_nginx_proxy_request_timeout is 60s

* default matrix_nginx_proxy_request_timeout - 60s

* few more variables for request timeout

* Update nginx.conf.j2

* Update nginx.conf.j2

This reverts commit 732051b8fc.

There's no such container image published yet.

http://nginx.org/en/CHANGES

Upgrade certbot (v1.16.0 -> v1.17.0) nginx (1.21.0 -> 1.21.1)

Related to https://github.com/spantaleev/matrix-docker-ansible-deploy/pull/1057

Related to https://github.com/spantaleev/matrix-docker-ansible-deploy/pull/1057

Not sure if this is beneficial though.