chore: adding some explanations about setting prometheus password

* fix for string concatenation on matrix_synapse_account_threepid_delegates_email and matrix_synapse_account_threepid_delegates_msisdn

* .editorconfig should not be ignored

* Restore .gitignore

Co-authored-by: b <b@b>
Co-authored-by: Slavi Pantaleev <slavi@devture.com>

change port 8090 to matrix_ma1sd_default_port

We were applying the low-memory system patch to webpack.config.js
on systems with < 4GB memory.

From now on, we also let people force-enable patching by toggling the
`matrix_client_element_container_image_self_build_low_memory_system_patch_enabled`
variable.

Related to https://github.com/spantaleev/matrix-docker-ansible-deploy/issues/1357

Upgrade Heisenbridge (1.4.0 -> 1.4.1)

GoMatrixHosting v0.6.4

fixes #1365

docker-ce does not like quotes around the shm-size value

Related to https://github.com/spantaleev/matrix-docker-ansible-deploy/issues/1268

Related to https://github.com/spantaleev/matrix-docker-ansible-deploy/issues/1364

Fixes https://github.com/spantaleev/matrix-docker-ansible-deploy/issues/1362

Fixes https://github.com/spantaleev/matrix-docker-ansible-deploy/issues/1357

Should have been done in 63f5a88fa0.

Upgrade Heisenbridge (1.3.0 -> 1.4.0)

update IRC appservice

https://github.com/matrix-org/matrix-appservice-irc/releases/tag/0.32.1

caddy example fixes

- caddy v1 requires a path in the header directive
- msisd has been replaced in favour of ma1sd

Prometheus & Grafana Update

Upgrade Element (v1.9.3)

https://github.com/vector-im/element-web/releases/tag/v1.9.3

add auto proxy synapse worker metrics

Upgrade Heisenbridge (1.2.1 -> 1.3.0)

In short, the problem is that older Postgres versions store passwords
hashed as md5. When you dump such a database, the dump naturally also
contains md5-hashed passwords.
Restoring from that dump used to create users and updates their passwords
with these md5 hashes.
However, Postgres v14 prefers does not like md5-hashed passwords now (by default),
which breaks connectivity. Postgres v14 prefers `scram-sha-256` for
authentication.

Our solution is to just ignore setting passwords (`ALTER ROLE ..`
statements) when restoring dumps. We don't need to set passwords as
defined in the dump anyway, because the playbook creates users
and manages their passwords by itself.

Fixes https://github.com/spantaleev/matrix-docker-ansible-deploy/issues/1340

Gomatrixhosting v0.6.3 hotfix2

GoMatrixHosting v0.6.3 [hotfix]

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

Fix link to nginx files in configuring-playbook-own-webserver.md