add portdate
diff --git a/src/libString/portdate b/src/libString/portdate
new file mode 100644
index 0000000..473f26c
--- /dev/null
+++ b/src/libString/portdate
@@ -0,0 +1,17 @@
+s_alloc.c 2004/1225
+s_append.c 2004/1225
+s_array.c 2004/1225
+s_copy.c 2004/1225
+s_getline.c 2004/1225
+s_grow.c 2004/1225
+s_memappend.c 2004/1225
+s_nappend.c 2004/1225
+s_parse.c 2004/1225
+s_putc.c 2004/1225
+s_rdinstack.c 2004/1225
+s_read.c 2004/1225
+s_read_line.c 2004/1225
+s_reset.c 2004/1225
+s_terminate.c 2004/1225
+s_tolower.c 2004/1225
+s_unique.c 2004/1225
