components. This allows users of Qt to specify QTDIR=/path/to/qt instead
of having to patch all configure scripts and makefiles to look for alternate
names. This is the recommended approach from Troll Tech (Qt authors).
update pkgs which use qt1 to reflect this.
for each of the continuation lines, rather than using backslashes to
continue a single, long definition. This makes it much easier to spot
pre-requisite packages and other dependencies.
