- Call warnx() instead of errx() if a directory is not readable when using

a recursive search.  This is the expected behavior instead of aborting.

PR:		bin/162907
Submitted by:	Jan Beich <jbeich@tormail.net>
MFC after:	3 days

usr.bin/grep/util.c

@@ -130,7 +130,9 @@ grep_tree(char **argv)
 		case FTS_DNR:
 			/* FALLTHROUGH */
 		case FTS_ERR:
-			errx(2, "%s: %s", p->fts_path, strerror(p->fts_errno));
+			notfound = true;
+			if(!sflag)
+				warnx("%s: %s", p->fts_path, strerror(p->fts_errno));
 			break;
 		case FTS_D:
 			/* FALLTHROUGH */