Does it support LDAPS / TLS?

Thanks for this useful project!

What would be the config options for ldaps:// ?

I understand below configs invoke `ldap.initialize("ldap://...`
```
host="0.0.0.0",
port="3893",
base_dn="dc=glauth,dc=com",
bind_username=os.environ["GLAUTH_USERNAME"],
bind_password=os.environ["GLAUTH_PASSWORD"],
```

Start by tracing the Python LDAP setup represented by ldap.initialize("ldap://...") and the listed host, port, and bind settings. Determine how an ldaps:// or TLS connection would be configured, then define the required options and verify the secure connection behavior. No implementation files or tests are named in the issue.

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