Log Message:
multimedia: Replace RMD160 checksums with BLAKE2s checksums

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

The following distfiles could not be fetched (for legal reasons?):

./multimedia/adobe-flash-player/distinfo \ 
adobe-flash-player-32.0.0.465/flash_player_npapi_linux.i386.tar.gz
./multimedia/adobe-flash-player/distinfo \ 
adobe-flash-player-32.0.0.465/flash_player_npapi_linux.x86_64.tar.gz
./multimedia/libdvdcss/distinfo libdvdcss-1.4.3.tar.bz2