Add support for the SASL authentication method for LDAPv3 servers.
Currently Keycloak supports none and simple authentication schemes for LDAP binding. JNDI provides support for SASL authentication schemes.
Authentication type would be: none, Simple, SASL
If a user selects SASL, additional configuration boxes are required:
SASL Mechanism: DIGEST-MD5 or CRAM-MD5
SASL Realm: the realm of the principal used during authentication using DIGEST-MD5 SASL mechanism.