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Update CUPS to current 1.4.4: "CUPS 1.4.4 fixes several security, scheduler, printing, and conformance issues." Also remove PKG_BUILD_DEPENDS, since zlib is already a normal dependency. Signed-off-by: Jonas Gorski <jonas.gorski+openwrt@gmail.com> git-svn-id: svn://svn.openwrt.org/openwrt/packages@24067 3c298f89-4303-0410-b956-a3cf2f4a3e73