please set math/gnuplot PDF=off by default, or resolve texlive vs teTeX

[Anton Shterenlikht]

# make -C /usr/ports/math/gnuplot/ showconfig
===> The following configuration options are available for gnuplot-4.6.5_3:
     CAIRO=on: Cairo graphics library support
     DOCS=on: Build and/or install documentation
     EXAMPLES=on: Build and/or install examples
     GD=on: GD graphics library support
     GRIDBOX=on: Use the gridbox optimization for hidden3d
     PDF=on: PDF document support
     ^^^^^^

On "pkg upgrade" this causes:

pkg: WARNING: locally installed texlive-texmf-20120701_4 conflicts on /usr/local/share/texmf/web2c/mktexupd with:
        - teTeX-base-3.0_25

So I have to "pkg del gnuplot" before "pkg upgrade",
then "pkg add" gnuplot from a local repo.

If PDF=off by default, this will be avoided.
Users, who need PDF support (like me) will then
have to rebuild/reinstall it manually, but it
is easier to automate this way.

Alternatively, TEX_DEFAULT should be made to be
aknowledged. I have it set:

# cat /etc/make.conf 
TEX_DEFAULT=texlive

but this seems to have to effect on "pkg upgrade",
probably because the gnuplot package is built
with the default TEX_DEFAULT?= tetex.

Thanks

Anton