A simple command-line utility written in Java that checks if secure communication between your local JVM and a remote host is successful. It verifies that your certificates are valid and are properly installed on your local java keystore.

• Add documentation about testing.
• Support parsing multiple Proxy-Authenticate headers.

• Support secure proxies, optionally with authentication (Basic scheme).
• Change how proxy parameters are passed to the application.
• Show basic handshake information on stderr.

• Minor fixes.
• Update documentation.

• Tested with OPNSense (Squid) with and without proxy authentication.
• Requires Java 11.