[project @ 2004-08-31 09:48:28 by simonmar]

Rationalise the install settings a bit.  Before, if you had $OWNER or
$GROUP set in your environment, then these would lead to options being
given to install, possibly with unexpected results.  This caused
install to fail for at least one person.

Now, $(INSTALL_OWNER) and $(INSTALL_GROUP) are set via
config.mk/build.mk as with other settings.