[openib-general] [RFC] Notice/InformInfo event reporting

[Sean Hefty]

Based on Todd's feedback, I'm using the following approach:

Add a new module, ib_notice, that tracks InformInfo registration requests.

Users register to receive Notices for a given trap number.

Clients are automatically re-registered if needed by the ib_notice module, but 
do receive an error notification when re-registration occurs.

The ib_notice module uses the ib_sa module for subscriptions, but registers with 
the MAD layer to receive notices.

InformInfo and Notice definitions are encapsulated in the ib_notice module.

- Sean