- update to 4.8.21
** Core
* Cancel Chmod/Chown/Advanced chown operation for large group of files when operation is not permitted (#3850)
* Mouse support in the "Advanced chown" dialog window (#3148)
* File highlighting by extension is case insensitive by default (#1620)
* Safe file overwrite (#3913)
** VFS
* Support zstd compression format (#3906)
** Editor
* Syntax:
- Rust support (#3884)
- JavaScript modules support (#3890)
- Improve Markdown support (#3893)
** Viewer
** Diff viewer
** Misc
* Add JavaScript module support to filehighlight.ini (MidnightCommander/mc#132)
* Add Excel xlsx file format support to mc.ext.in (MidnightCommander/mc#135)
* i18n of argument type names in --help blocks (#3879)
* Code cleanup: (#3857, #3914)
** Fixes
* Fail to link to ncurses built as two libraries: ncurses+tinfo (#3880)
* Garbage in displaying of summary of file sizes for selected files (#3883)
* "Compute totals" unnecessarily done for moves (#3149, #3908)
* mc.ext: allow Java class files to be viewed even if JAD isn't on PATH (MidnightCommander/mc#134)
* mcedit: broken extended key mode (#3897)
* mcedit doesn't save all opened files (#3898)
* extfs: sftps: -31 SFTP Protocol Error when transferring file (#3406)
* extfs: rpm: truncated script content in the viewer (#3865)
* extfs: rpm helper misses CONFLICTS field (#3789)