[openib-general] putting in dead wood for DAPL and similar abomination

[Christoph Hellwig]

Please don't put in things like the address translation service or
memory windows for DAPL folks.  The IB code in the kernel already
has far too much unused stuff and adding more will not go past reviews
for kernel inclusions - as will DAPL itself exactly because of such
utter stupidities.  Similar hint to the NFS over RDMA folks at CITI -
if you want your stuff to go in use the openib helper directly below
the transport switch - differnet RDMA transports are too diverse to
be sanely abstracted out and DAPL does a horrible job at that.  If
we need to consolidate code for differnt transports we can put it
into a library later on.