[openib-general] SRP device management client (and a few opensm glitches)

[Roland Dreier]

    Yael> Hello Roland, When turning on only the comp_mask for the
    Yael> local_port_num you will get all relevant PortInfo records
    Yael> from the switches.  These records do have many fields zeroed
    Yael> out (e.g subnet_prefix), but they are still valid records.
    Yael> Is this what you are seeing?

I guess the bug is related, because in my test fabric which has a
single 24-port switch chip, I see 24 entries with a zero base_lid and
a local_port_num of 2.

 - R.