ports/153873: graphics/gegl enscript option forces a4 version, creating conflict

[Pietro Cerutti]

> building graphics/gegl with the ENSCRIPT option enabled forces
> installation of enscript-a4 with no option to install enscript-letter.
> This causes a port conflict if enscript-letter is already installed,
> or else forces you to use an A4 paper size.

This is not correct. If enscript-letter is installed, gegl will be more
than happy to use that one. Both enscript-a4 and enscript-letter install
a bin/enscript file. That is what gegl looks for. If that binary does
not exist, then gegl's dependency reverts to enscript-a4, but this
happens only when enscript is not installed in the first place.

I'm closing this PR now, please ask to reopen it if you find that there
is really a problem with gegl.

-- 
Pietro Cerutti
The FreeBSD Project
gahr at FreeBSD.org

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