stack size to an appropriate size. System dies on AIX without this due
to too small of a stack.

   libelanhosts library.
 o Test for libelanhosts at configure time.

are specific to a particular plugin type.

   capablitlies that have been added to the kernel!

 o cleanup some slurm makefiles

loadable as shared aliases. Give slurm functions a prefix of "slurm_" to
insure that no user functions with the same name is used instead.
[For some reason a this same commit a minute ago did not seem to take effect.]

 o need to compile authd module with libe

the plugins themselves. Add new functions to each plugin to return the
error number and given an error number, return a description.

lacking an elan switch.

modifications were relatively minor - mostly changes in function
names or arguments.

failure as fatal error.

job logs, state save directories, etc.

This logic was added temporarily for testing gnats slurm/223.

re-opening it for every write. Moving the log file generates a
SIGHUP, which triggers a re-open anyway.

Use it directly from  backfill plugin (instead of API call).