again - even though the automake docs consider AM_CONFIG_HEADER obsolete, 
   it currently still breaks for too many people to justify this change
   at the moment.


configure.in:
   - reverted change from AC_CONFIG_HEADERS to AM_CONFIG_HEADER again - even
     though the automake docs consider AM_CONFIG_HEADER obsolete, it currently
     still breaks for too many people to justify this change at the moment.