Flag uname/group functions as unix-specific and add NO-OP Windows versions.
Flag uname/group functions as unix-specific and add NO-OP Windows versions.

wimh/coreutils,tempbottle/coreutils,wimh/coreutils,kevgeniy/coreutils,uutils/coreutils,ebfe/coreutils,kevgeniy/coreutils,uutils/coreutils,keunwoo/coreutils,jbcrail/coreutils,Arcterus/coreutils,jbcrail/coreutils,ebfe/coreutils,tempbottle/coreutils,uutils/coreutils,Heather/coreutils,Heather/coreutils,Arcterus/coreutils,keunwoo/coreutils