* UTILITIES/server.mk: Re-introduce, keep in UTILITIES like the other
server stuff. Implement "helpserver" and link into "help" and
"helpall" targets. Add "reltest" target to clean up the work tree
and produce release archives, uses internal target "rel-dirty" for
the actual archive creation. Warn if $(ORGVERSION) is different
from $(GITVERSION), as a release should only be made from a revision
that has an annotated tag.