[arch-dev-public] [signoff] nilfs-utils 2.0.21

Hi, new bug fix release. Please test and signoff. Users signoffs are welcome. Changelog: nilfs-utils-2.0.21 Fri Jan 21, 2011 JST * get rid of the warning telling disk format is unstable * change license of libraries and header files to LGPL; crc was replaced with an LGPL implementation along with this. * discard blocks at mkfs time * add verbose option to mkfs.nilfs2 * kill gcc warnings -- Ionuț