template: sync usage() with man page `-o' was missing. Patch from Josiah Frentsos, thank you!

portable: template: use as a subproject Move template into its own subproject as it's only needed at compile-time and shouldn't be installed. This needs compiling with the host compiler which is configurable via HOSTCC and HOSTCLFAG environment variables. This diff largely from op@ but additional tweaking from myself.

portable: gotwebd: use template This updates -portable's gotwebd instance to make use of the new templating engine.

template: adjust my address

import template ok tracey@