sysstat 10.2.0

sysstat version 10.2.0 final packaging.
lsm, spec and CREDITs files updated.
Changelog added.
Typo and cosmetic fixes.

Signed-off-by: Sebastien GODARD <sysstat@orange.fr.fake>
Starting sysstat 10.2.1

Update sysstat version number in configure script.

Signed-off-by: Sebastien GODARD <sysstat@orange.fr.fake>