Ubuntu LTS 16.04.6 available

Ubuntu LTS 16.04.6 is available (see the change summary for more details). Although 16.04.6 cannot boot on the Talos family, it does support POWER8, and is particularly relevant to our 32-bit PowerPC friends as it is the final Ubuntu release to support that architecture officially. All Power ISA official releases of Ubuntu are Server branded and do not install a GUI by default. Installation images are hosted at the Ubuntu download site.