[ale] Ubuntu 18.04 release notes

[DJ-Pfulio]

https://wiki.ubuntu.com/BionicBeaver/ReleaseNotes#Updated_Packages
Worth a read. Lots of changes from 16.04 stuff.

* 4.15 Kernel
* Spectre fixes
* Meltdown fixes
* gcc compiler changes to randomize memory
* CIFS default protocol changed
* OpenJDK 10 is default
* ssh keys must be 1024 or larger
* X11 is default, not Wayland
* Gnome3 is default with Ubuntu theme
* Netplan.io replaces interfaces ifupdown packages for network configs
(ouch!)

There are about 20 other really important things to know.  I'll be
impacted by at least 5 of them.