unzip in basesystem.

Hi,

I noticed that unzip came into basesystem in src/usr.bin/unzip/. To
prevent port installing the ports/archivers/unzip one, I propose to
add this in bsd.port.mk

.if defined(USE_ZIP) && !exists(/usr/bin/unzip)
EXTRACT_DEPENDS+=       ${LOCALBASE}/bin/unzip:${PORTSDIR}/archivers/unzip
.endif

Is that right ?

King regards

-- 
Demelier David