Log message:
extend PYTHON_VERSIONS_ for Python 3.7

Log message:
Comment out dead sites.

Log message:
Add python-3.6 to incompatible versions.

Log message:
Remove python33: adapt all packages that refer to it.

Log message:
Extend PYTHON_VERSIONS_INCOMPATIBLE to 35

Log message:
Add SHA512 digests for distfiles for www category

Problems found locating distfiles:
	Package haskell-cgi: missing distfile haskell-cgi-20001206.tar.gz
	Package nginx: missing distfile array-var-nginx-module-0.04.tar.gz
	Package nginx: missing distfile encrypted-session-nginx-module-0.04.tar.gz
	Package nginx: missing distfile headers-more-nginx-module-0.261.tar.gz
	Package nginx: missing distfile nginx_http_push_module-0.692.tar.gz
	Package nginx: missing distfile set-misc-nginx-module-0.29.tar.gz
	Package nginx-devel: missing distfile echo-nginx-module-0.58.tar.gz
	Package nginx-devel: missing distfile form-input-nginx-module-0.11.tar.gz
	Package nginx-devel: missing distfile lua-nginx-module-0.9.16.tar.gz
	Package nginx-devel: missing distfile nginx_http_push_module-0.692.tar.gz
	Package nginx-devel: missing distfile set-misc-nginx-module-0.29.tar.gz
	Package php-owncloud: missing distfile owncloud-8.2.0.tar.bz2

Otherwise, existing SHA1 digests verified and found to be the same on
the machine holding the existing distfiles (morden).  All existing
SHA1 digests retained for now as an audit trail.

Log message:
Mark packages that are not ready for python-3.3 also not ready for 3.4,
until proven otherwise.

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:
Fix a common mistake in many different packages: POSIX says that when using
pax -rw, the destination directory must exist. pax in NetBSD creates it if
not, pax in MirBSD complains. I read through all pkgsrc Makefiles that use
pax and added an entry to INSTALLATION_DIRS, or an INSTALL_DATA_DIR
invocation.

I did not test all the changes but they should be fairly safe. If you notice
any breakage because of this change, please contact me.

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