FreeBSD Port: gifsicle-1.90

[Greg Kennedy]

Two issues with this port.

* There is a new version of this upstream, gifsicle 1.91.

* The default config for gifsicle is to include X11 (graphics) support.
With this option enabled, you get an additional application "/bin/gifview",
which simply lets you view a GIF file in X.  This also pulls in a number of
x11 dependencies.  And, because this is the default FreeBSD config, it
causes the package to be built dependent on X.

        libX11: 1.6.5,1
        xproto: 7.0.31
        libxcb: 1.12_2
        libXdmcp: 1.1.2
        libXau: 1.0.8_3
        libpthread-stubs: 0.4
        kbproto: 1.0.7

Most users DO NOT need this feature: gifsicle is primarily intended for use
on servers as a means to lossless-optimize GIF images and save bandwidth.
End users who need a gif viewer will almost certainly never use gifview
provided by gifsicle, and instead simply use a web browser, or other image
viewer.

I suggest that the port Makefile be modified so that OPTIONS_DEFAULT is
empty instead of containing X11.