du: read block size environment variables
du: read block size environment variables

blocksize env variables are read if -B is not specified as a command
line argument.
blocksize is now case insensitive (like gdu).

fn translate_to_pure_number() pulled out from existing code which
populated the block size variable

tempbottle/coreutils,tempbottle/coreutils,uutils/coreutils,uutils/coreutils,uutils/coreutils