API and Web UI changes: https://airdcpp-web.github.io/2021/01/08/version-2.11.0.html

Changed:

- Let the operating system set the optimal socket write/read buffer sizes by default (can multiply per-connection transfer speeds with faster connections, https://bugs.launchpad.net/dcplusplus/+bug/1909853)
- Improve hashing speed by increasing the read buffer from 256 kilobytes to 1024 kilobytes (https://bugs.launchpad.net/dcplusplus/+bug/1909861/comments/9)
- Increase the default file write buffer from 64 kilobytes to 256 kilobytes

Fixed:

- Fix inconsistencies with filelist transfer logging