Log message:
Mark packages as not ready for python-3.x where applicable;
either because they themselves are not ready or because a
dependency isn't. This is annotated by
PYTHON_VERSIONS_INCOMPATIBLE=  33 # not yet ported as of x.y.z
or
PYTHON_VERSIONS_INCOMPATIBLE=  33 # py-foo, py-bar
respectively, please use the same style for other packages,
and check during updates.

Use versioned_dependencies.mk where applicable.
Use REPLACE_PYTHON instead of handcoded alternatives, where applicable.
Reorder Makefile sections into standard order, where applicable.

Remove PYTHON_VERSIONS_INCLUDE_3X lines since that will be default
with the next commit.

Whitespace cleanups and other nits corrected, where necessary.

Log message:
Drop superfluous PKG_DESTDIR_SUPPORT, "user-destdir" is default these days.

Log message:
Bump PKGREVISION from default python to 2.7.

Log message:
PR/29576 -- Use @RCD_SCRIPTS_SHELL@ in rc.d scripts, not /bin/sh

Log message:
Bump revision for PYTHON_VERSION_DEFAULT change.

Log message:
Remove @dirrm entries from PLISTs

Log message:
Switch to Python 2.5 as default. Bump revision of all packages that have
changed runtime dependencies now.

Log message:
Mark as destdir ready.

Log message:
Update PYTHON_VERSIONS_COMPATIBLE
- assume that Python 2.4 and 2.5 are compatible and allow checking for
fallout.
- remove PYTHON_VERSIONS_COMPATIBLE that are obsoleted by the 2.3+
default. Modify the others to deal with the removals.

Log message:
Allow to build with python24.  Bump PKGREVISION due to dependency change.