HAVE_UNISYS_LICENSE on graphics/ImageMagick

[Norikatsu Shigemura]

	Do you need following option?

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# Produce standard (small) GIFs
.if defined(HAVE_UNISYS_LICENSE) || \
    (defined(USA_RESIDENT) && ${USA_RESIDENT} == "YES")
CONFIGURE_ARGS+=        --enable-lzw
.endif
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	And, this was already updated to 6.0.5-3.  Do you have
	any paches?