Remove preserve_context_over_{fn, deferred}

Rename redact_content option to include_content

update prometheus-config to new format

This restores the config that is usable for prometheus pre v2.0.0
The new config only works for Prometheus v2+

Reshuffle room list request code

Add new boolean columns to port script

Make __init__ consistent across Store hierarchy

Both of these functions ae known to leak logcontexts. Replace the remaining
calls to them and kill them off.

I'm not entirely sure if this will actually help anything, but it simplifies
the code and might give further clues about why room list search requests are
blowing out the get_current_state_ids caches.

So we can see what it gets up to.

Add a route for determining who you are

Signed-off-by: Travis Ralston <travpc@gmail.com>

Cache failures in url_preview handler

Fix 500 on invalid utf-8 in request

because we had to wait until the logger was set up

Fix the test to pass the right number of args to the Store constructors

Add db_conn parameters to the `__init__` methods of the *Store classes, so that
they are all consistent, which makes the multiple inheritance work correctly
(and so that we can later extract mixins which can be used in the slavedstores)

This reverts commit f5cf3638.

Useful for applications which may have an access token, but no idea as to who owns it.

Signed-off-by: Travis Ralston <travpc@gmail.com>

Reshuffle the caching logic in the url_preview handler so that failures are
cached (and to generally simplify things and fix the logcontext leaks).

Downcase userid on registration

Explain why we don't validate userids registered via app services

If somebody sends us a request where the the body is invalid utf-8, we should
return a 400 rather than a 500. (json.loads throws a UnicodeError in this
situation)

We might as well catch all Exceptions here: it seems very unlikely that we
would get a request that *isn't caused by invalid json.

Force username to lowercase before attempting to register

https://github.com/matrix-org/synapse/issues/2660

This reverts commit b70b6469.

Allow upper-case characters in mxids

Because we're never going to be able to fix this :'(

Namespace visibility options for groups