[ofiwg] completion flags as actually defined by OFI

[Hefty, Sean]

These are the new completion flags and their definitions that I have in a pending patch.

*FI_INJECT_COMPLETE*
: Indicates that a completion should be generated when the
  source buffer(s) may be reused.  A completion guarantees that
  the buffers will not be read from again and the application may
  reclaim them.  No other guarantees are made with respect to the
  state of the operation.

*FI_TRANSMIT_COMPLETE*
: Indicates that a completion should be generated when the transmit
  operation has completed relative to the local provider.  The exact
  behavior is dependent on the endpoint type.

  For reliable endpoints:

  Indicates that a completion should be generated when the operation has
  been delivered to the peer endpoint.  A completion guarantees that the
  operation is no longer dependent on the fabric or local resources.  The
  state of the operation at the peer endpoint is not defined.

  For unreliable endpoints:

  Indicates that a completion should be generated when the operation has
  been delivered to the fabric.  A completion guarantees that the
  operation is no longer dependent on local resources.  The state of the
  operation within the fabric is not defined.

*FI_DELIVERY_COMPLETE*
: Indicates that a completion should not be generated until an operation
  has been processed by the destination endpoint(s).  A completion
  guarantees that the targets have visibility into the results of the operation.

  This completion mode applies only to reliable endpoints.  For operations
  that return data to the initiator, such as RMA read or atomic-fetch,
  the source endpoint is also considered a destination endpoint.  This is the
  default completion mode for such operations.