Log message:
Remove redundant NO_CHECKSUM and EXTRACT_ONLY definitions.

Log message:
Added support for installation to DESTDIR.

Log message:
Updated pkg_regress to 0.2.

Changes since 0.1:
- Improved error messages.
- Made the code simpler.

Log message:
Took maintainership.

Log message:
As long as pkg_regress is not mentioned in the pkgsrc guide, it does not
deserve to have the pkgsrc guide as a homepage.

Log message:
Refer doc/pkgsrc.html instead of Packages.txt (HOMEPAGE variable).

Log message:
Move invocation of make into a do_test_default, and provide overridable
function do_test, which by default just invokes do_test_default.

For jlam's overriding pleasure.

Log message:
Portability fixes.

Log message:
* Make PKGSRC_TOPDIR a private variable by renaming it to _PKGSRC_TOPDIR,
  as it's only used internally by bsd.prefs.mk.

* Make _PKGSRCDIR a public variable by renaming it to PKGSRCDIR.
  Also, generate its value from ${_PKGSRC_TOPDIR} so it's less fragile
  than the old method of stripping off the last two components of
  ${.CURDIR}.  PKGSRCDIR may now be used after bsd.prefs.mk is defined.

* Change all references to _PKGSRCDIR to PKGSRCDIR.

Log message:
Add pkg_regress, a regression testing system for the pkgsrc infrastructure.
Tests are found in pkgsrc/regress, tests are run by executing pkg_regress.

Based on an idea discussed at pkgsrcCon 2004. Thanks to dillo@ for review
and refinements, and to jlam@ for review.