Note that links to the issues and PRs on the original repository (matrix-org/synapse) should not be replaced with ones on the forked one (element-hq/synapse) as those are not available on the latter, where the issues and PRs with the same number as matrix-org/synapse are "reserved" to avoid conflicts between those repositories. For reasoning of such complexity (including the reason why trasferring the original repository to element-hq/synapse was avoided), see: https://github.com/element-hq/synapse/issues/6#issuecomment-1861116896

Signed-off-by: Suguru Hirahara <acioustick@noreply.codeberg.org>

Signed-off-by: Suguru Hirahara <acioustick@noreply.codeberg.org>

Issues and Pull Requests were not migrated to the new
organization/repository, so `matrix-org/synapse/pull` and
`matrix-org/synapse/issues` references were kept as-is.

`matrix-org/synapse-s3-storage-provider` references were also kept,
as that module still continues living under the `matrix-org` organization.

This patch mainly aims to change documentation-related things, not actual
usage in full yet. For polish that, another more comprehensive patch is coming later.

It's been pointed out that DEBUG logs could contain sensitive
information (access tokens, etc.), which makes them unsuitable
for sharing with others. INFO should be enough.

Also discussed previously in #213 (Github Pull Request).

shared-secret-auth and rest-auth logging is still at `INFO`
intentionally, as user login events seem more important to keep.
Those modules typically don't spam as much.