fatal-signal: Pass the signal number to the action. * lib/fatal-signal.h (at_fatal_signal): Change the signature. * lib/fatal-signal.c (action_t): Take the signal number as parameter. (fatal_signal_handler): Pass the signal number to the action. * lib/clean-temp.c (cleanup_action): Renamed from cleanup. Take the signal number as parameter. (create_temp_dir): Update. * lib/wait-process.c (cleanup_slaves_action): New function. (register_slave_subprocess): Update at_fatal_signal invocation. * NEWS: Mention the change.

Please create and read the docs with

  $ cd doc
  $ make gnulib.html
  $ xdg-open gnulib.html

or read the online manual at

  https://www.gnu.org/software/gnulib/manual/gnulib.html