Deltachat

- new qr-code type `DC_QR_WEBRTC` 1779

- new `dc_chatlist_get_summary2()` api 1771

- tweak smtp-timeout for larger mails 1782

- optimize read-receipts 1765

- Allow http scheme for DCACCOUNT URLs 1770

- improve tests 1769

- bug fixes 1766 1772 1773 1775 1776 1777

- new apis to initiate video chats 1718 1735

- new apis `dc_msg_get_ephemeral_timer()`
and `dc_msg_get_ephemeral_timestamp()`

- new api `dc_chatlist_get_summary2()` 1771

- improve IMAP handling 1703 1704

- improve ephemeral messages 1696 1705

- mark location-messages as auto-generated 1715

- multi-device avatar-sync 1716 1717

- improve python bindings 1732 1733 1738 1769

- Allow http scheme for DCACCOUNT urls 1770

- more fixes 1702 1706 1707 1710 1719 1721
1723 1734 1740 1744 1748 1760 1766 1773 1765

- refactorings 1712 1714 1757

- update toolchains and dependencies 1726 1736 1737 1742 1743 1746

- introduce ephemeral messages 1540 1680 1683 1684 1691 1692

- `DC_MSG_ID_DAYMARKER` gets timestamp attached 1677 1685

- improve idle 1690 1688

- fix message processing issues by sequential processing 1694

- refactorings 1670 1673

- fix handling of `mvbox_watch`, `sentbox_watch`, `inbox_watch` 1654 1658

- fix potential panics, update dependencies 1650 1655

- fix sorting, esp. for multi-device

- improve ndn heuristics 1630

- get oauth2 authorizer from provider-db 1641

- removed linebreaks and spaces from generated qr-code 1631

- more fixes 1633 1635 1636 1637