- restore after combined mainboard+harddisk crash
- cleanup/fixes for 2.1 release
- fix invoke to actually do work
- refactor invoke shortcuts, gcc cannot inline
  varargs functions.
- optimised invoke to 4-5 insns in the common case.
- optimised (For no good reason) the int-to-ascii
  conversions of dynbuf_text into division-less and
  branchless code (of which I am pretty proud).
- actually move players to their savebed when they did
  not use one and the map has been reste in the meantime.
  does not kill (yet) when too long.
- enter_map is now handled completely in perl.
- goto is now using generation counting to ensure that only the
  most-recently-issues goto will succeed.
- make some heavy use of __builtin_expect to streamline
  rare callbacks even more.
- optimised thawer.

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get rid of X in configure.ac

- implement cf::map::unique_maps ()
- support string overloading for cf::path objects
- minor cleanups