Add procmail-example, referenced in README.

diff --git a/procmail-example b/procmail-example
new file mode 100644 (file)
index 0000000..f39ac2a
--- /dev/null
+++ b/procmail-example
@@ -0,0 +1,7 @@
+# This would be a typical procmail rule to copy patches sent
+# to a mailing list to patchq.
+
+:0c
+* ^Subject:.*PATCH
+* ^X-BeenThere: libguestfs@redhat.com
+| /path/to/patchq/inject-mbox.py