Off by default.  A Temple keeps its doors shut until its keeper says
otherwise.  HtServEnable; writes ~/HtServ.HC, and from the next boot
on Once.HC, right after the network is up, runs that file and starts
HtServ in a terminal of its own.  HtServDisable; deletes it.  Whatever
HolyC sits in the file runs first, so htserv_verbose=TRUE; goes there.

No more typing #include at a VNC console every time the hosting company
reboots the rack.  The CIA still has to knock on port 80 like everyone
else.

Tested in QEMU on a disk image: fresh boot, no server; HtServEnable,
reboot, the server answered by itself; HtServDisable, reboot, silence.