releasing key guide under CC 4.0 BY-SA

_ref/sources

@@ -1,3 +1,13 @@
+######################################################################################################
+# This work is licensed under the Creative Commons Attribution-ShareAlike 4.0 International License. #
+# To view a copy of this license, visit                                                              #
+# http://creativecommons.org/licenses/by-sa/4.0/.                                                    #
+######################################################################################################
+
+= NOTES =
+
+This document is largely just a dump of "further reading" resources.
+
 https://github.com/openssh/openssh-portable/blob/master/PROTOCOL.key
 	canonical: https://cvsweb.openbsd.org/src/usr.bin/ssh/PROTOCOL.key?annotate=HEAD
 https://peterlyons.com/problog/2017/12/openssh-ed25519-private-key-file-format/
@@ -48,4 +58,4 @@ https://github.com/openssh/openssh-portable/blob/master/authfile.c
 	sshkey_save_private_blob (~L56)
 https://github.com/openssh/openssh-portable/blob/master/ssh-keygen.c
 	funcs:
-	main (~L3145; ~L3673 onwards for key generation)
+	main (~L3145; ~L3673 onwards for key generation)