Name service switch enhancements

This release contains upward compatible changes to the name service switch (nss) and to the Name Switch Cache Daemon - nscd(1M)- in order to deliver new functionality including the following:

• Better caching in nscd(1M) and management of connections within the updated framework.

• Name service lookups that are access controlled at the naming service on a per-user basis. The updated switch framework adds support for this style of lookups using SASL/GSS/Kerberos in a manner that is compatible with the authentication model used in Microsoft Active Directory.

• A framework for the future addition of putXbyY interfaces.