ino64 status report 5

[Gleb Kurtsou]

ino64 project aims at extending ino_t to 64 bits and nlink_t to 32 bits
integers providing compatibility shims for both kernel and libc.

I'm working and changing VOP_READDIR implementations for all filesystems
in tree. The idea is to use recently added d_off field in struct dirent
and drop cookies from VOP_READDIR. I have a patch changing most of the
filesystems, it's only zfs, unionfs and nfs (server and client, both old
and new implementations) that missing. I've also changed ABI
compatibility layers for linux, svr4 and ibcs2. Next week I also plan to
write a readdir test utility to test everything more thoroughly before
committing.