- Remove unnecessary unused files
- Remove duplicate encryption configuration sample from sources and
  re-use the identical file in RPM directory instead
- Clean away harmful "default-character-set = utf8mb4" from client config
  as it is unnecassary (server enforces utf8mb4 anyway by default) and
  could cause issues with mysqlbinlog and other tools (MDEV-22981).
- Update S3 plugin description to be long enough
- Remove trailing whitespace from support-files and Debian packaging.
- Clean away fixed Lintian issues
- Clean away temporary Salsa-CI fixes now that 10.5.4 is out and is fixed
- Apply wrap-and-sort -a -v