File fix-extract-over-links.patch of Package libarchive

--- a/libarchive/archive_write_disk_posix.c.orig	2016-12-02 13:13:57.433550535 +0000
+++ a/libarchive/archive_write_disk_posix.c	2016-12-02 13:16:36.770020356 +0000
@@ -2051,12 +2051,14 @@ create_filesystem_object(struct archive_
 			/* EPERM is more appropriate than error_number for our callers */
 			return (EPERM);
 		}
-		r = check_symlinks_fsobj(linkname_copy, &error_number, &error_string, a->flags);
-		if (r != ARCHIVE_OK) {
-			archive_set_error(&a->archive, error_number, "%s", error_string.s);
-			free(linkname_copy);
-			/* EPERM is more appropriate than error_number for our callers */
-			return (EPERM);
+		if (a->flags & ARCHIVE_EXTRACT_SECURE_SYMLINKS) {
+			r = check_symlinks_fsobj(linkname_copy, &error_number, &error_string, a->flags);
+			if (r != ARCHIVE_OK) {
+				archive_set_error(&a->archive, error_number, "%s", error_string.s);
+				free(linkname_copy);
+				/* EPERM is more appropriate than error_number for our callers */
+				return (EPERM);
+			}
 		}
 		free(linkname_copy);
 		r = link(linkname, a->name) ? errno : 0;