Command to get a group's quota
When external quota commands are being used, the program set in this
option can be called by Virtualmin to fetch the quota for a single group.
It is called with a single parameter - the Unix group name, and must output
a single line containing the following space-separated fields :
- Current quota used in 1 kB blocks.
- The soft quota in 1 kB blocks, or 0 for unlimited.
- The hard quota in 1 kB blocks, or 0 for unlimited.
If this command is not set on the Module Config page, Virtualmin will
use the Command to list group quotas instead.