libsmartcols: add separator getters/setters

Signed-off-by: Ondrej Oprala <ooprala@redhat.com>
Merge branch 'scols' of git://github.com/ooprala/util-linux
libsmartcols: improve line and cell separators

Signed-off-by: Karel Zak <kzak@redhat.com>
last: fix minor typos in the man page

Signed-off-by: Ondrej Oprala <ooprala@redhat.com>
runuser: fix minor typos in the man page

Signed-off-by: Ondrej Oprala <ooprala@redhat.com>
su: fix minor typos in the man page

Signed-off-by: Ondrej Oprala <ooprala@redhat.com>
sulogin: minor man page improvements

Signed-off-by: Ondrej Oprala <ooprala@redhat.com>
utmpdump: minor man page improvements

Signed-off-by: Ondrej Oprala <ooprala@redhat.com>
nologin: minor man page improvements

Signed-off-by: Ondrej Oprala <ooprala@redhat.com>
vipw: minor man page improvements

Signed-off-by: Ondrej Oprala <ooprala@redhat.com>
addpart: minor man page improvements

Signed-off-by: Ondrej Oprala <ooprala@redhat.com>
cfdisk: minor man page improvements

Signed-off-by: Ondrej Oprala <ooprala@redhat.com>
delpart: minor man page improvements

Signed-off-by: Ondrej Oprala <ooprala@redhat.com>
libsmartcols: use buffer struct in table_print.c

 * consolidate code in table_print.c
 * make the code easy to extend
 * use return codes everywhere

Signed-off-by: Karel Zak <kzak@redhat.com>