slurm_send_recv_node_msg(), slurm_send_recv_rc_msg(), etc.
 o Fixed fd leak in agent.c using slurm_send_recv_rc_msg() w/ timeout.

   slurm_protocol_socket_implementation.c
 o Added new functions slurm_send_recv*rc_msg() for handing common
   mode of sending a message and receiving only a "return code" message.
 o Overhauled existing code and performed general cleanup.

Streamline the API: eliminate activate() and fold it into a new create(), rename free() to destroy(), make unpack() return an allocated credential instead of being passed a 'blank' one

common needs to read anyway to route communications (avoid second read
by other tools).

for mutex lock/unlock with error messages.

   along with other general bugfixes and cleanup.

 o cbuf.[ch] list.[ch] : begin using Chris' list and cbuf routines
   from the LSD-Tools project.

 o srun/srun.c : *Always* wait for I/O to complete. This still needs work.

 o srun/launch.c : code cleanup

read_config functions.

than 1024 file descriptors the select function call silently fails
and corrupts memory.

bad message. Functions now return SLURM_ERROR on bad unpack instead
of assert failure.

(so shutdown command can shutdown both servers).

a slurm_addr.

and NodeAddr. These represent the network addresses for ControlMachine,
BackupController, and NodeName records respectively.

that includes a buffer pointer, size, and offset. The buffer is automatically
expanded as space is needed.

It used to seg-fault.

   definition of slurm_auth_t opaque type, and provides functions fitting
   the prototypes defined in slurm_auth.h

   provided by libauth.
 o update to new auth include namespace (slurm_authentication -> slurm_auth)
 o Actually use and verify authentication header

 o Some error and debug message cleanup.