Ignore keys and other secrets (#2409)

.gitignore

@@ -44,3 +44,60 @@
 
 ## compressed
 **/*.tgz
+
+## vscode
+.vscode/*
+!.vscode/settings.json
+!.vscode/tasks.json
+!.vscode/launch.json
+!.vscode/extensions.json
+!.vscode/*.code-snippets
+
+# Local History for Visual Studio Code
+.history/
+
+## other keys
+*.key
+*.keys
+*.priv
+*.rsa
+*.key.json
+
+## ssh keys
+*.ssh
+*.ssh-key
+.key-mrc
+
+## Certificate Authority
+*.ca
+
+## Certificate
+*.crt
+
+## Certificate Sign Request
+*.csr
+
+## Certificate
+*.der 
+
+## Key database file
+*.kdb
+
+## OSCP request data
+*.org
+
+## PKCS #12
+*.p12
+
+## PEM-encoded certificate data
+*.pem
+
+## Random number seed
+*.rnd
+
+## SSLeay data
+*.ssleay
+
+## S/MIME message
+*.smime
+*.vsix