- Use the generic target for m68k

- update to 1.8.0:
+ Revised the incremental mode to let the current character counts
grow for each character position independently, with the aim to
improve efficiency in terms of successful guesses per candidate
passwords tested.
+ Revised the pre-defined incremental modes, as well as external
mode filters that are used to generate .chr files.
+ Added makechr, a script to (re-)generate .chr files.
+ Enhanced the status reporting to include four distinct speed
metrics (g/s, p/s, c/s, and C/s).
+ Added the "--fork=N" and "--node=MIN[-MAX]/TOTAL" options for
trivial parallel and distributed processing.
+ In the external mode compiler, treat character literals as unsigned.
+ Renamed many of the formats.
+ Updated the documentation.
+ Relaxed the license for many source files to cut-down BSD.
+ Relaxed the license for John the Ripper as a whole from GPLv2
(exact version) to GPLv2 or newer with optional OpenSSL and
unRAR exceptions.
+ Assorted other changes have been made.
- add simple man pages for relbench and mailer scripts
- disable jumbo patch for now until a version for 1.8.0 is out