[vchkpw] Vadddomain should create limits entry in MySQL

[Jonathan Viney]

Hi,

I have just checked with 5.3.28 and when creating a new domain with
vadddomain, an entry is not added for the domain in the limits table.
This means that the vmoddomlimits command doesn't work and fails with
"Failed to vget_limits".

I suggest that either a) an entry is created with the domain or b)
vmoddomlimits creates one if necessary.

Thanks,

Jonathan