support (RPC xfer and printing) of some missing control info.

 o slurmd shared memory fixes -- no longer detach/reattach around interconnect_init
 o put slurm.lock in spooldir by default
 o slurmd daemonize is now the default
 o log.c fixes -- use a shorter timestamp in logfiles

 o fix _STMT_START in macros.h
 o remove annoying "Interrupted system call" debug error for accept()
   with slurm_protocol_socket_implementation.c
 o fix some assert macros in xassert and xmalloc

Major clean-up of slurm_protocol_pack (not finished, but about half done).

for mutex lock/unlock with error messages.

   logfile == NULL

   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