The Slackware ARM on a Raspberry Pi 3 (SARPi3) installer and kernel/modules/boot-firmware packages have been updated to kernel 4.4.8. You can find and download these files here:
http://rpi3.fatdog.eu/index.php?p=downloads
You will notice there is a new rpi3-hacks-3.0 package. This package makes modifications to the system config and also adds a command to /etc/rc.d/rc.local to set the system time at boot from a ntp server (providing an Internet connection is available). Details of this package and the modifications it makes can be found here:
http://rpi3.fatdog.eu/files/extra/rpi3-hacks.README
The SARPi3 guide/tutorial has *NOT* been updated yet - I hope to do this over the coming weekend.
