Deltachat

- expunge deleted messages 1440

- do not send `DC_EVENT_MSGS_CHANGED|INCOMING_MSG` on hidden messages 1439

- new config options `delete_device_after` and `delete_server_after`,
each taking an amount of seconds after which messages
are deleted from the device and/or the server 1310 1335 1411 1417 1423

- new api `dc_estimate_deletion_cnt()` to estimate the effect
of `delete_device_after` and `delete_server_after`

- use Ed25519 keys by default, these keys are much shorter
than RSA keys, which results in saving traffic and speed improvements 1362

- improve message ellipsizing 1397 1430

- emit `DC_EVENT_ERROR_NETWORK` also on smtp-errors 1378

- do not show badly formatted non-delta-messages as empty 1384

- try over SMTP on potentially recoverable error 5.5.0 1379

- remove device-chat from forward-to-chat-list 1367

- improve group-handling 1368

- `dc_get_info()` returns uptime (how long the context is in use)

- python improvements and adaptions 1408 1415

- log to the stdout and stderr in tests 1416

- refactoring, code improvements 1363 1365 1366 1370 1375 1389 1390 1418 1419

- removed api: `dc_chat_get_subtitle()`, `dc_get_version_str()`, `dc_array_add_id()`

- removed events: `DC_EVENT_MEMBER_ADDED`, `DC_EVENT_MEMBER_REMOVED`

- new flag DC_GCL_FOR_FORWARDING for dc_get_chatlist()
that will sort the "saved messages" chat to the top of the chatlist 1336
- mark mails as being deleted from server in dc_empty_server() 1333
- fix interaction with servers that do not allow folder creation on root-level;
use path separator as defined by the email server 1359
- fix group creation if group was created by non-delta clients 1357
- fix showing replies from non-delta clients 1353
- fix member list on rejoining left groups 1343
- fix crash when using empty groups 1354
- fix potential crash on special names 1350

- handle keys reliably on armv7 1327

- change generated key type back to RSA as shipped versions
have problems to encrypt to Ed25519 keys

- update rPGP to encrypt reliably to Ed25519 keys;
one of the next versions can finally use Ed25519 keys then

- save traffic by downloading only messages that are really displayed 1236

- change generated key type to Ed25519, these keys are much shorter
than RSA keys, which results in saving traffic and speed improvements 1287

- improve key handling 1237 1240 1242 1247

- mute handling, apis are dc_set_chat_mute_duration()
dc_chat_is_muted() and dc_chat_get_remaining_mute_duration() 1143

- pinning chats, new apis are dc_set_chat_visibility() and
dc_chat_get_visibility() 1248

- add dc_provider_new_from_email() api that queries the new, integrated
provider-database 1207

- account creation by scanning a qr code
in the DCACCOUNT scheme (https://mailadm.readthedocs.io),
new api is dc_set_config_from_qr() 1249

- if possible, dc_join_securejoin(), returns the new chat-id immediately
and does the handshake in background 1225

- update imap and smtp dependencies 1115

- check for MOVE capability before using MOVE command 1263

- allow inline attachments from RFC 2183 1280

- fix updating names from incoming mails 1298

- fix error messages shown on import 1234

- directly attempt to re-connect if the smtp connection is maybe stale 1296

- improve adding group members 1291

- improve rust-api 1261

- cleanup 1302 1283 1282 1276 1270-1274 1267 1258-1260
1257 1239 1231 1224

- update spec 1286 1291