/*
* Check if the file system specified by the 'mp' mount structure is
* exported to a client with 'anon' anonymous credentials. The 'mb'
* argument is an mbuf containing the network address of the client.
* The return parameters for the export flags for the client are returned
* in the address specified by 'wh'.
*
* This function is used exclusively by the NFS server. It is generally
* invoked before VFS_FHTOVP to validate that a client has access to the
* file system.
*/