v0.28.0

• Breaking change (federation) Changed NewClient to take HTTP client settings as an extra parameter.
• (federation) Changed client to block requests to private IPs by default.
  • The AllowIP method can be changed to adjust the blocking behavior.
• (federation) Added DownloadMedia method.
• (event) Added Extra field to FileInfo to allow easily adding custom fields.
• (event) Added sticker source info to events (both [MSC4459] and a custom format for bridges).
• (client) Added support for server parameter in /publicRooms (thanks to @zluudg in #497).
• (client) Added RequestRetryTrigger event, which can be used to force all in-flight requests to be interrupted and retried (e.g. in case the network connection changed).
• (crypto) Added support for bundled device keys in Olm messages introduced in Matrix v1.15.
• (crypto/canonicaljson) Added jsonv2-based implementation, which replaces the old gjson/sjson-based implementation when jsonv2 is enabled.
• (bridgev2) Added interface for importing image packs from remote networks.
• (bridgev2) Added more detail to "not logged in" error messages.
• (bridgev2) Expanded bridge_matrix_leave option to cover invite rejections in addition to actual leaves.
• (bridgev2) Changed group creation error messages to be clearer when there aren't enough members to create a group.
• (bridgev2/matrix) Changed message sending to never send unencrypted messages if encryption.require is set true even if the room is unencrypted.
• (crypto) Changed trust resolution to not trust own cross-signing master key unless the private key is available or the public key is signed by the device key.
• (bridgev2) Fixed event power levels being set incorrectly in some cases if events_default or state_default is changed in the same event.
• (bridgev2) Fixed portal deletion always failing due to context cancellation.
• (bridgev2) Fixed per-message profile fallbacks being added for events that shouldn't have it, like stickers.
• (bridgev2) Fixed some cases where backfill would start from a non-latest message.
• (crypto) Fixed dehydrated devices not passing device key validation.
• (federation/pdu) Fixed canonicalizing JSON which contains keys with code points between \uF000 and \uFFFF by switching to the crypto/canonicaljson package instead of jsonv2's standard RFC 8785 canonicalization.
• (federation/eventauth) Fixed restricted join checks (thanks to @timedoutuk in #491).
• (federation/eventauth) Fixed creator join check in v10 rooms (thanks to @timedoutuk in #496).
• (crypto/goolm) Fixed various small issues.