Log Message:
Update autogen to 5.6.0 and bl3ify.

Changes since 5.5.3:
  * AutoFSM was enhanced with the notion of a "noop" transition handling
  * fmemopen() is now used (when possible) for anonymous output (diversions)
  * The Guile function (chdir "...") is now wrapped so AutoGen can adapt
  * the definitions parser now uses a FSM parser instead of YACC
  * AutoOpt-ed programs can now have internationalized usage text
  * Templates have been added for using getopt(3) or getopt_long(3GNU)
    to parse options (in lieu of libopts).
  * better docs on partitioned ini (rc) files