Initial onfca commit

Updated help target in Makefile
Reworked for IM CAs
Added CRL handling
Added docs/references

Change-Id: I2b1eb541464c157d3626bbe4a6cf7db78c2af533
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..8bd7ca5
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,7 @@
+# SPDX-FileCopyrightText: © 2022 Open Networking Foundation <support@opennetworking.org>
+# SPDX-License-Identifier: Apache-2.0
+
+*.pem
+*.csr
+*.key
+*_pki