Support multiple suffixes in iconv_open, like glibc does. * lib/iconv_open1.h: Use a loop when looking for the common suffixes. * tests/test-discard.c: New file. * tests/Makefile.in (check): Run test-discard. (test-discard, test-discard.@OBJEXT@): New targets. (clean): Remove test-discard. (SOURCE_FILES): Add test-discard.c. * NEWS: Mention the change.