LDAP connector: additional options to Go LDAP

[jtfrey]

The LDAP connector implements explicit configuration options that map to the underlying Go module's configuration options; not every option available in the underlying Go module is present in the LDAP connector. Several times in the past I've submitted pull requests that add support for LDAP alias dereferencing (to the user- and group-search contexts) to the connector; they have gone nowhere. Our LDAP directory service uses alias directories, so our use of dexidp requires dereferencing be enabled.

Are there additional config options to the Go LDAP module that would be useful to mirror in the dexidp connector's config? Maybe an "expert mode" array of options could be added that are passed verbatim to the Go module that allows for changes to the Go module to not require explicit handling in the LDAP connector?