Prototypes for data struct changes and new functions.
Changes for xattr's due to new nfsv4 file handle.
referral changes due to nfsv4 file handle changes.
Changes to init procedure due to avltree and hashtable additions for pseudofs.
More changes due to new nfsv4 file handle.
Replace use of the reverse_tab pseudofs node list with direct reference of avltree node.
Add avltree, hashtable, print, other functions to be used in pseudofs.
Also add some global variables to be used in pseudofs.
nfs4_ExportToPseudoFS() updated for new pseudofs avltree/hashtable.
nfs4_CurrentFHToPseudo() updated for new pseudofs avltree/hashtable
nfs4_PseudoToFhandle() updated for new pseudofs avltree/hashtable
nfs4_op_lookup_pseudo() updated for new pseudofs avltree/hashtable
nfs4_op_lookupp_pseudo_by_exp() updated for new pseudofs avltree/hashtable
nfs4_op_readdir_pseudo() updated for new pseudofs avltree/hashtable
Fix spacing and a typo.