afs-web-interface-enhancements-20010623

afs-web-interface-enhancements-20010623

Changes include:

1) Token caching: Functions to set the current "PAG" (not really a process
   authentication group, but a generic identifier for a user session)
   to a specific value, allowing us to switch tokens between different
   threads of the Web server without reauthenticating.

2) Performance enhancements: The main improvement is that we can check
   whether a directory is a mount point in advance and avoid doing a stat
   or contacting the destination cell.  We've also enabled bulk statting
   with kolya's patch from 11/2000.

3) New UAFS API's to call various pioctl functions, etc.

enclosed in  AFS_WEB_ENHANCEMENTS ifdef