[administrivia] Add .gitignore files, based on .cvsignores.
diff --git a/doc/mpls/.gitignore b/doc/mpls/.gitignore
new file mode 100644
index 0000000..1218df9
--- /dev/null
+++ b/doc/mpls/.gitignore
@@ -0,0 +1,2 @@
+.arch-ids
+.arch-inventory