Change so that it works on platforms where isalpha is a macro only,

Change so that it works on platforms where isalpha is a macro only,

	* tests/strfunc-test.c: (main): Change so that it works
	on platforms where isalpha is a macro only, without the
	corresponding function that the C standard requires.
	Also eliminate the multiple lists of ctype functions.

	* tests/.cvsignore: Ignore the new test.