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)

Fixed: SOCKS4 response, report by Max