* Update OpenSSL to version 1.1.1t (RoLex)
* Temporarily fix buffer overflow error when receiving large chat messages, needs a complete rewrite (RoLex)
* Add hublist.pwiam.com and dchublist.biz to list protected against CTM requests (RoLex)
* Add dchublist.biz hublist by default (RoLex)
* Remove dchublist.org hublist due to user count falsification for own interests (RoLex)
* $MaxedOut sends queue position parameter on NMDC hubs, thanks to iceman50 (RoLex)
* Missing in all clients - force login timeout after 2 minutes (RoLex)
* Merge with DC++ 0.880 (RoLex)
* Add support for TTHS NMDC extension to save traffic on both sides with short TTH searches, widely supported by Verlihub (RoLex)
* Add support for BotList, HubTopic and MCTo NMDC extensions, widely supported by Verlihub (RoLex)
* Add /mcpm command for private main chat messages, currently only for NMDC hubs that support MCTo extension (RoLex)
* Don't waste our and NMDC hub resources when we don't want user commands (RoLex)
* Update zlib to version 1.2.12 (RoLex)
* Update Boost to version 1.79 (RoLex)
* Update MiniUPnPc to version 2.2.3 (RoLex)
* Update GeoIP to version 1.7.0 (RoLex)
* Add settings to show user IP and country in main and private chats when available (RoLex)
* Add %[extra] variable support to main and private chat log formats when available, this shows user IP and country (RoLex)
* Add global and favorite hub settings to disable TLS NMDC client-client connections, this allows transfers between us and old clients (RoLex)
* Add setting to skip tray icon notification on PM from bots or hub (RoLex)
* Add setting to disable creation of taskbar menu with list of open windows (RoLex)
* Add status line to user information, displays supported flags - Normal, Away, Server, Fireball and TLS, NMDC only (RoLex)
* Properly show away, fireball and server status on NMDC hubs (RoLex)
* Save last away status on restart (RoLex)
* About dialog now shows used OpenSSL version (RoLex)
* Fix locale detection when building help files on CygWin (RoLex)
* Fix negative upload and download statistics due to int64_t declaration (RoLex)
* Fix C++20 deprecation warnings (RoLex)
* Fix crash on missing help files (RoLex)
* [LB#841189] [LQ#698901] Add support for secure NMDC client to hub connections, port defaults to 411, requires nmdcs:// in URL (RoLex)
* Add support for secure hub address when available in public hubs (RoLex)
* Add support for secure NMDC client to client connections, requires successful TLS configuration on our side and specified TLS flag in remote user $MyINFO (RoLex)

Fixed: Freeze on proxy edit while running
Added: Buffer size for proxy server and port mapper
Added: Description hints to proxy and mapper dialogs

* Update OpenSSL to version 1.1.1n
* Offer the current testing release to a random subset of users at start (emtee)
* [L#1965620] Restore TLS connections to certain servers with multiple hostnames (fix adapted from AirDC++) (emtee)

* Adaptively determine fastest TLS 1.3 ciphersuites (klondike)
* [L#1703150] Fix crash when closing NMDC hubs (emtee)
* [L#1909853] Allow the operating system to determine the best socket buffer sizes by default (maksis)
* Add option to exclude encrypted private messages from logs (emtee)
* [L#1445330] Allow CCPM on unencrypted ADC hubs (emtee)
* [L#1853692] Blacklist an unmaintained hublist server
* [L#1829064] Add new hublist server dcnf.github.io
* [L#1815377] Fix a bug that could keep files from hashing due to CRC errors when automatic .sfv checking is enabled (emtee)
* [L#1910274] Don't add incomplete TTH trees to hash database (cologic)
* [L#1649066] Don't share files/directories with non-UTF-8 names on Linux/macOS/BSDs (cologic)
* Fix GeoIP country in the Transfer View and Search window (emtee)
* Keep existing GeoIP files after an unsuccessful download (emtee)
* Update OpenSSL to version 1.1.1k
* Require TLS 1.2 or newer (currently only TLS 1.3)-based ADCS connections (cologic)
* "Require TLS ADC client-client connections" setting now on by default (poy)
* Drop support for SHA-1-based ciphersuites due to chosen-prefix collisions from https://sha-mbles.github.io/ (cologic)
* Disallow Diffie-Hellman keys smaller than 2048 bits to mitigate the Logjam attack (cologic)
* Update bzip2 to version 1.0.8
* Update MiniUPnPc to version 2.2.1
* Update Boost to version 1.72

API and Web UI changes:

- http://airdcpp-web.github.io/2021/07/27/version-2.11.1.html
- http://airdcpp-web.github.io/2021/09/19/version-2.11.2.html

Changed:

- Print better error messages when updating the country database fails
- Encryption: accept TLS_CHACHA20_POLY1305_SHA256 cipher
- Allow closing various tab with Ctrl+W

Fixed:

- Fix a possible crash when uploading files
- Fix possible filelist-related crashes
- Fix issues with saving of options on the extension tab
- Fix warnings with hubs that are blocking direct private messages (shown only for AirDC++ users)
- Fix reopening of previously viewed text files (https://bugs.launchpad.net/airdcpp/+bug/1917271)
- Fix sending of UDP data when connecting to a SOCKS5 server via IPv4
- Fix listing of drive content when browsing local file system in the Web UI

Removed:

- Main menu item to match own filelist with ADL search (you can still match your own filelist after it has been opened)