Make 'fs listquota' output readable for large quota

Make 'fs listquota' output readable for large quota

With the old print format quota and used values became one large
number for quotas in the terabyte range.

Fix alignment of the "no limit" string in the Windows fs command
for volumes with no quota.

Reviewed-on: http://gerrit.openafs.org/34
Verified-by: Russ Allbery <rra@stanford.edu>
Reviewed-by: Russ Allbery <rra@stanford.edu>
Reviewed-by: Jeffrey Altman <jaltman@openafs.org>
(cherry picked from commit 42d64b5b1f9944fe35bd6358ebeba9a24162243e)
Change-Id: I2dbb186a91df96ec1b0693e8ccd3bda01ac28a48
Reviewed-on: http://gerrit.openafs.org/932
Reviewed-by: Derrick Brashear <shadow@dementia.org>
Tested-by: Derrick Brashear <shadow@dementia.org>