feat: Optional TLS Support

[amunra]

Whole connection encryption using TLS.

Feature

There are three TLS options:

• Disabled
• Enabled
• Insecure Skip Verify

The enabled option can either use well-known CAs or you can specify a file path to your own CA.

TLS options are passed in via the sec_opts argument before connecting.

Relationship with Authentication

This change is orthogonal to authentication: Either feature may be turned on or off independently.

See examples for more details.