interconnect_postfini(). This should prevent any processes from
changing pgid to escape from a job so as to avoid releasing a
switch window.

find a container (e.g. pid is not found).

a bug when the network string does not contain "us" and the
normal federation table setup is skipped.

Add extra malloc return code checking and cleanup in fed_copy_jobinfo.

timeout). This gives the interconnect_postfini() the opportunity to
execute and free switch windows before reporting current switch window
use.

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.