Ensure the bootstrap.sh is backwards compatible with the current agent.
Ensure the bootstrap.sh is backwards compatible with the current agent.

Jasperswaagman/agent,joelmoss/agent,es/agent,grosskur/agent,Shopify/agent,Jasperswaagman/agent,es/agent,buildkite/agent,tommeier/agent,buildkite/agent,Shopify/agent,grosskur/agent,Shopify/agent,grosskur/agent,tommeier/agent,Jasperswaagman/agent,joelmoss/agent,es/agent,joelmoss/agent,tommeier/agent,buildkite/agent