Changes since 4.2.0-rc:

• Restored missing statement() methods in some policyrep classes

• Fixed NULL pointer dereference when iterating over type attributes when the policy has none

• Added xdp_socket permission mapping

Changes since 4.2.1:

• Remove source policy references from man pages, as loading source policies is no longer supported.
• Fix a performance regression in alias loading after alias dereferencing fixes in 4.2.1