Documentation about custom preseeds doesn't mention the OS

[Raphaël Badin]

The documentation about custom preseeds (http://maas.ubuntu.com/docs/development/preseeds.html) hasn't been updated when multi-os support was added and is thus outdated (in a way that makes it very difficult for users to use that feature).

Current documentation:

User-provided preseeds
{prefix}_{node_architecture}_{node_subarchitecture}_{release}_{node_name}
{prefix}_{node_architecture}_{node_subarchitecture}_{release}
{prefix}_{node_architecture}_{node_subarchitecture}
{prefix}_{node_architecture}
{prefix}
'generic'

It should be changed to patterns like: {prefix}_{osystem}_{node_architecture}_{node_subarchitecture}_{release}_{node_name} (see preseed.py).

This is true for both trunk and the 1.7 documentation.

[Raphaël Badin (rvb)]

Side note: it's probably worth saying explicitly that the {node_name} part refers to the node's hostname and not the node's FQDN. I had a user do the mistake just now and I must admit this can be confusing.

[Mark Dickie (mark-dickie)]

Quick note that the correct pattern appears to be {prefix}_{osname}_{node_architecture}_{node_subarchitecture}_{release}_{node_name}

I have tested and can confirm that this works.