Log message:
adjust the BUILTIN_VERSION_SCRIPT to match xorgproto 2018.1's xproto 7.0.32.

Log message:
fake up xorgproto support for native xsrc.  it has some failings
but is likely sufficient:

- add xorgproto support to x11-links, bump version
- add a builtin.mk for xorgproto.  check for the list of packages
  that xorgproto covers, eliding the few that native xsrc never
  installed, and making sure xproto is last.  use the
  BUILTIN_VERSION_SCRIPT method to convert Version: 7.0.31 into
  the necessary 2018.1.

the missing packages are a problem, but since we've never had a
report about it, it's not a big problem.

the things newer xorgproto has that are wanted may be a problem,
but probably only for X11_TYPE!=native builds that don't really
need these.

longer term native xsrc will get xorgproto (and maybe even for
netbsd-8), though i'm not sure it will help any unless we make
our native xsrc install a fake xorgproto.pc that pkgsrc can
find an use -- currently xorgproto installs .pc files for all
the replaced packages, but not one for itself, so the hack of
finding xproto version and switching may still be needed.

ok @wiz.

Log message:
xorgproto: make it a build dependency by default.

Log message:
xorgproto: update to 2018.4.

This release updates the specifications and protocol headers for DRI3
and Present to 1.2, and fixes several spelling and grammar errors in
the specification texts.

Log message:
xorgproto: update to 2018.3.

This adds RandR leasing and non-desktop monitors along with fixing the
autotools build to include xcalibrate header files (if LEGACY is
selected).

Log message:
xorgproto: update to 2018.2.

This release fixes various version numbers and include paths, corrects
an error in the RANDR specification, and adds the meson build system
which was erroneously left out of 2018.1.

Log message:
x11/xorgproto: import xorgproto-2018.1

This package combines the X protocol headers, which were formerly
scattered in individual packages.