Not only are you allowed, but also encouraged. You can start by subscribing to [email protected] and [email protected] mailing lists. Feel free to provide ideas, feedback and help make our code better. For more information on contacts, mailing lists and forums, see Getting Support.
Do you provide automated installation scripts based on Puppet or similar solutions?
Yes. For information, contact us.
Is it possible to connect the API Manager directly to an LDAP or active directory, so that it offers the REST APIs an authentication method?
Yes. You can configure the API Manager with multiple user stores. See Configuring User Stores.
Clustering and distributed deployment questions
This should be done in the backend services in the Application Server or WSO2 ESB.