On BlueGene where KillWait=120, this induces a substantial delay.

Remove the temporary fed_libstate_t structs used in
switch_p_libstate_[save|restore], and therefore eliminate the
fed_libstate_t copies.  This required some rearranging of code to
put make the locking safe.

PTRACE_DETRACE is defined on AIX, but it is the incorrect value.
PT_DETACH is correct.

to create network tables when network string contains "us" or "US".

"us" is the POE/LoadLeveler designation for using the federation
switch.

Fix adapter_count accounting problem.

    terminate slurmd with a fatal error and don't crash slurmctld.

address after the call to realloc.

we can avoid dereferencing a null pointer

* Increased the size of the buffer used to store libstate from
  128KB to 1MB