pbkdf2 usage optimization in zip format (thanks solar and sc00bz)
MPI documentation updates.
Fix for -fork vs. -max-run-time.
MPI: Read/write .rec file compatible with --fork.
Merge branch 'bleeding-jumbo' into memdbg

* bleeding-jumbo:
  MPI: Read/write .rec file compatible with --fork.
  Fix for -fork vs. -max-run-time.
  MPI documentation updates.
  pbkdf2 usage optimization in zip format (thanks solar and sc00bz)

Conflicts:
	src/gladman_pwd2key.c
	src/signals.c
	src/zip_fmt.c