* Transparent File Compression
* Previous File Versions with Snapper
* Larger IO sizes for SMB2/3 by default
* SMB2 leases
* Messaging improvements
* Samba Registry Editor
* VFS WORM module
* VFS FRUIT module - decent OSX support!
Release Announcement:
https://www.samba.org/samba/history/samba-4.2.0.html
More details about the features:
https://wiki.samba.org/index.php/Samba_4.2_Features_added/changed
