Catamount PTLLND now runs sanity

Catamount PTLLND now runs sanity

* Resolved a number of unitilized variables
* Remove unused plb_refcount
* ptllnd_close_peer() released ref (could have been last) and then touched peer pointer.
* .lnd_wait was not defined in ptllnd.c causing LNET to reject it as a valid LND in single thread environment.
* Incorrect check on buf->plb_posted caused assert to be triggered in destroy_buffer
* buf->plb_posted was never set to 0 on unlink causing infinite loop.
* plni_nposted_buffers was never decremented would hit ASSERT
* Portals NID was not retrivied, and LNET NID was not created, caused init failure.
* type == INVALID value cause active_rdma to always issue PtlPut()
* (CLEANUP) variable ni, masks parameter ni
* Credits not given to peer correctly in HELLO message.
* Credits never decremented
* Matchbits did not handle reserved properly
* Bulk MD/ME should be inserted BEFORE (PTL_INS_BEFORE) all the small message MD for performance reasons.
* Missing PTL_ACK_DISABLE
* HELLO Message payload was being swab'ed even when it wasn't supposed to be.
* Some complex syntax of x?yz comibend with to few parthensis was causing md.options to be set incorrectly and messages to be dropped
* MD options not set properly in ptllnd_active_rdma
* MD threshold calculation compares against invalid type
* ptllnd_recv() used rlen rather than mlen
* Fixes for max_immd_size being max message size, not max immidate payload size.