unicode: check $LC_ALL to detect Unicode mode, not only $LANG

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
foo*sum: report I/O errors, don't merely exit with 1.

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
tail: track file size only in -f mode

This eliminates extra fstat and lseek calls on every read

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
foo*sum: Correct syntax error

coreutils/md5_sha1_sum.c:156:3: error: expected '}' before 'else'

Signed-off-by: Cristian Ionescu-Idbohrn <cristian.ionescu-idbohrn@axis.com>
Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>
unicode: check $LC_CTYPE too to detect Unicode mode

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
Apply post-1.21.0 patches, bump version to 1.21.1

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

update config for 1.21.1
Signed-off-by: Tanguy Pruvot <tanguy.pruvot@gmail.com>

Signed-off-by: Paul Beeler <sparksco@gmail.com>
Merge remote-tracking branch 'bb/master' into sm-jb-mr1