Add space to store device configuration data

[Kris Deugau]

Devices with management IPs are likely to need backing up in case they implode and need replacing. Provide a set of storage fields to plonk down brand, model, access type, access from (some devices may be on different management networks), access user, access password, "root" password (VTY and enable passwords, from Cisco devices), and an alternate connection port

[Kris Deugau]

(In [779]) /trunk

Begin adding configuration backup fields with the tabledef and link to
the allocations/poolips tables. See #52.

Also note an index for composite key that may not be useful

[Kris Deugau]

(In [782]) /trunk

Add device-backup fields to pool IP assignment. See #52.

• allocateBlock() in IPDB.pm
• new assignment page

Refine CSS hiding space-gobbling fields so it can be used multiple places

[Kris Deugau]

(In [783]) /trunk

Missed allocation confirmation page in r782. See #52.

[Kris Deugau]

(In [784]) /trunk

Update getBlockData() to retrieve backup data if present. See #52.

[Kris Deugau]

(In [786]) /trunk

Update edit page to show backup fields. See #52.

[Kris Deugau]

(In [788]) /trunk

Update IP assignment update and IP delete for backup data. See #52.

[Kris Deugau]

(In [813]) /trunk

Wrap validation of backup fields in an ACL check. See #52.