Log message:
Split plotutils and gnuplot into '<pkgname>' and '<pkgname>-nox11' each
(alternatively, we could have renamed one to '<pkgname>-x11', but for the
element of least surprise, the default remains x11 enabled).
This will work much better than the previous attempt to build two packages
from one Makefile, which wasn't all thought out wrt to dependencies, buildlinks etc.
Bump PKGREVISION on plotutils and gnuplot for this.

Log message:
Same as plotutils:
If X11 is present, set the pkgname to gnuplot-x11 and conflict with
plain gnuplot (and the other way around).

Log message:
If X is found to be present, this package builds and installs gnuplot_x11,
if not, not.  Fix accordingly.  Pointed out by wiz@.  Sorry.

Log message:
Update to 3.7.3, from Jim Bernard in PR 19663.
Changes:
3.7.3
* Major: contributed code to re-add gamma, inverse normal, and
  inverse error function
* Windows specific fixes, most visibly changing the 'pause' command
  to avoid cpu hogging, and updated build procedures
* Improved metapost driver
* Make Linux driver work with devfs
* Numerous bugfixes backported from development version, see ChangeLog
* A large number of documentation misprints have been fixed

3.7.2
* Major: we have removed code that was labeled with a
  non-commercial use clause. The effect is that this
  removes the gamma, inverse normal, and inverse error
  function from platforms that have no native
  implementation.
* Support for BeOS
* New terminal drivers: emf (Enhanced Metafile Format),
  epslatex, ggi (General Graphics Interface), pdf, svg
 (W3C Scalable Vector Graphics)
* Updated png driver: web-friendly palette, transparent
  images, explicit colour specification
* Updated HPGL driver: optional multi-pen support,
  alternative plot sizes, variable font sizes
* Updated gnugraph driver: now requires GNU plotutils 2.2
  or better
* Updated eepic driver: picture environment now scales with
  "set size"
* Updated fig driver to fig file format 3.2
* Updated tkcanvas driver
* Fix font size option in pslatex driver
* configure-alike script for VMS
* Command substitution in double-quoted strings
* Vector clipping style for 2D plots
* Sort terminals by name before displaying
* Numerous bugfixes

Log message:
Add png support. Bump version to 3.7.1nb1. Requested in PR 18798.

Log message:
buildlink1 -> buildlink2