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