v2.6.0

Advice on the hydra disclosure

do not upgrade rooms until the following conditions have been met:

1. You are using Draupnir v2.5.1 or above.
2. You have considered that not every user in your room will be able to follow
   the tombstone, because their own server has not upgraded yet. This could lead
   to them NEVER following the tombstone when the room becomes dead/lost to
   history
3. You are confident that you know what you are doing. The upgrade UX on Matrix
   is poor and you are likely to dos your own community in a worse way than an
   exploiter of any supposed vulnerability.

See https://matrix.org/docs/communities/administration/#room-upgrades for
current advice on upgrading rooms. We are adding features to Draupnir to make
room upgrades easier for users. See
the-draupnir-project/planning#44.

Added

• Replacement rooms will automatically be protected when protected rooms are
  upgraded.

Fixed

• V12 room identifiers can now be used in commands. Thanks to @cremesk for
  reporting.

Changed

• Room discovery has been made a synchronous part of the takedown command. This
  would happen in background before which could cause confusion if it failed.