set ssh control path

https://git.hammerle.me/fphammerle/config-openssh-user/commit/9c11b1a9afce3e5c53a5b8363f0fce3ed4be3479

ansible.cfg

@@ -2,3 +2,6 @@
 retry_files_enabled = False
 # https://docs.ansible.com/ansible/latest/plugins/callback.html#plugin-list
 stdout_callback = yaml
+
+[ssh_connection]
+control_path = ~/.ssh/%%r@%%n:%%p