Merge branch 'tb/test-apfs-utf8-normalization'

A test to see if the filesystem normalizes UTF-8 filename has been
updated to check what we need to know in a more direct way, i.e. a
path created in NFC form can be accessed with NFD form (or vice
versa) to cope with APFS as well as HFS.

* tb/test-apfs-utf8-normalization:
  test: correct detection of UTF8_NFD_TO_NFC for APFS

t/test-lib.sh

@@ -1106,12 +1106,7 @@ test_lazy_prereq UTF8_NFD_TO_NFC '
 	auml=$(printf "\303\244")
 	aumlcdiar=$(printf "\141\314\210")
 	>"$auml" &&
-	case "$(echo *)" in
+	test -f "$aumlcdiar"
-	"$aumlcdiar")
-		true ;;
-	*)
-		false ;;
-	esac
 '
 
 test_lazy_prereq AUTOIDENT '