Silent a set-but-not-used warning about sbflags

If XFS_ROOTHACK is not defined, sbflags gets set but never used. This
patch declares the variable only if needed.

Signed-off-by: Petr Písař <ppisar@redhat.com>
Signed-off-by: Jan Kara <jack@suse.cz>
Add quotagrpadmins(5) manual page

Signed-off-by: Petr Písař <ppisar@redhat.com>
Signed-off-by: Jan Kara <jack@suse.cz>
Add quotatab(5) manual page

Signed-off-by: Petr Písař <ppisar@redhat.com>
Signed-off-by: Jan Kara <jack@suse.cz>
Add warnquota.conf(5) manual page

Signed-off-by: Petr Písař <ppisar@redhat.com>
Signed-off-by: Jan Kara <jack@suse.cz>
Improve rpc.rquota(8) manual page

This patch renames rquotad(8) to rpc.rquotad(8) to reflect the
executable name. It also shows complete synopsis and documents --help option.

Signed-off-by: Petr Písař <ppisar@redhat.com>
Signed-off-by: Jan Kara <jack@suse.cz>