- Grammatical, LDLM updates to network.lyx

- dlm cleanups, bugfixes
- there are now two totally separate DLM callback packets and functions
- beginnings of ldlm /proc bits
- the lock server can now change the lock mode, in addition to the resource
- fix one part of the open() object creation race by adding a semaphore that's
  taken in ll_file_open
- some cleanup in obdclass/proc_lustre.c; much more is needed