2013/10/28 (diffstat 1.58)
	+ add COPYING file (request by Dagobert Michelsen).
	+ improved portability for cross-compiling, by supplying missing
	  getopt function as well as improving checks for popen/pclose
	  prototypes.
	+ updated configure macros, e.g., for MingW and MSYS fixes.
	+ update config.guess, config.sub