Log message:
www: Replace RMD160 checksums with BLAKE2s checksums

All checksums have been double-checked against existing RMD160 and
SHA512 hashes

Not committed (merge conflicts):
www/nghttp2/distinfo

Unfetchable distfiles (almost certainly fetched conditionally...):
./www/nginx-devel/distinfo array-var-nginx-module-0.05.tar.gz
./www/nginx-devel/distinfo echo-nginx-module-0.62.tar.gz
./www/nginx-devel/distinfo encrypted-session-nginx-module-0.08.tar.gz
./www/nginx-devel/distinfo form-input-nginx-module-0.12.tar.gz
./www/nginx-devel/distinfo headers-more-nginx-module-0.33.tar.gz
./www/nginx-devel/distinfo lua-nginx-module-0.10.19.tar.gz
./www/nginx-devel/distinfo naxsi-1.3.tar.gz
./www/nginx-devel/distinfo nginx-dav-ext-module-3.0.0.tar.gz
./www/nginx-devel/distinfo nginx-rtmp-module-1.2.2.tar.gz
./www/nginx-devel/distinfo nginx_http_push_module-1.2.10.tar.gz
./www/nginx-devel/distinfo ngx_cache_purge-2.5.1.tar.gz
./www/nginx-devel/distinfo ngx_devel_kit-0.3.1.tar.gz
./www/nginx-devel/distinfo ngx_http_geoip2_module-3.3.tar.gz
./www/nginx-devel/distinfo njs-0.5.0.tar.gz
./www/nginx-devel/distinfo set-misc-nginx-module-0.32.tar.gz
./www/nginx/distinfo array-var-nginx-module-0.05.tar.gz
./www/nginx/distinfo echo-nginx-module-0.62.tar.gz
./www/nginx/distinfo encrypted-session-nginx-module-0.08.tar.gz
./www/nginx/distinfo form-input-nginx-module-0.12.tar.gz
./www/nginx/distinfo headers-more-nginx-module-0.33.tar.gz
./www/nginx/distinfo lua-nginx-module-0.10.19.tar.gz
./www/nginx/distinfo naxsi-1.3.tar.gz
./www/nginx/distinfo nginx-dav-ext-module-3.0.0.tar.gz
./www/nginx/distinfo nginx-rtmp-module-1.2.2.tar.gz
./www/nginx/distinfo nginx_http_push_module-1.2.10.tar.gz
./www/nginx/distinfo ngx_cache_purge-2.5.1.tar.gz
./www/nginx/distinfo ngx_devel_kit-0.3.1.tar.gz
./www/nginx/distinfo ngx_http_geoip2_module-3.3.tar.gz
./www/nginx/distinfo njs-0.5.0.tar.gz
./www/nginx/distinfo set-misc-nginx-module-0.32.tar.gz

Log message:
www: Remove SHA1 hashes for distfiles

Log message:
Extend SHA512 checksums to various files I have on my local distfile
mirror.

Log message:
Remove mk/find-prefix.mk usage from the www category.

The find-prefix infrastructure was required in a pkgviews world where
packages installed from pkgsrc could have different installation
prefixes, and this was a way for a dependency prefix to be determined.

Now that pkgviews has been removed there is no longer any need for the
overhead of this infrastructure.  Instead we use BUILDLINK_PREFIX.pkg
for dependencies pulled in via buildlink, or LOCALBASE/PREFIX where the
dependency is coming from pkgsrc.

Provides a reasonable performance win due to the reduction of `pkg_info
-qp` calls, some of which were redundant anyway as they were duplicating
the same information provided by BUILDLINK_PREFIX.pkg.

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

Log message:
user-destdir installation support.

Log message:
Convert @exec/@unexec to @pkgdir or drop it.

Log message:
HOMEPAGE is gone, comment it out. From Sergey Svishchev.