implement user (un)locking

[JacksonChen666]

fixes #121

did not go with synadm user lock, since it seemed like it was gonna be extra work (due to modify api being one big monolithic thing for many things) and just adding on to synadm user modify was actually easier.

[JOJ0]

I tested on my prod server with a Synapse version that didn't have this admin-api-feature yet: It tries to set locking but it gets ignored without throwing an error. Also the "current settings" does not include locked: yet (we pull that via synadm user details.

I updated my Synapse to latest, now I see locked: false in the "current settings" list, and it can be successfully locked and unlocked.

LGTM, merge it please! :-)

[JacksonChen666]

i was going to add onto the PR with other commands that may not get the locked details, but the problem is i can't get a development synapse running right now i just resolved it :P

[ser]

Thank you very much! Appreciate.

[ser]

So maybe it's worth of new release? :)

[JacksonChen666]

So maybe it's worth of new release? :)

yes, one will come very soon