[unionfs][patch] improvements of the unionfs - Problem Report, kern/91010

[Daichi GOTO]

I have updated the patches:

   For 7-current patch
     http://people.freebsd.org/~daichi/unionfs/unionfs-p5.diff

   For 6.x patch
     http://people.freebsd.org/~daichi/unionfs/unionfs6-p5.diff

Changes from -p4:
   - fixed around "can't fifo/vnode bypass -1" panic problem
   - added some comments into source-code for src-developer
   - edited style as style(9) saye

-- 
   Daichi GOTO, http://people.freebsd.org/~daichi