- sigh. getpwd() can return null and we've not handled such case
- locally exploitable root bug in efs if setuid, thx to Paul Lasarev <paul@itk.ru>
- we've did nice setfsuid() but forgot about setfsgid() thus user's efs
  operations never worked (cause cookie was created with uid root :)
  thanks to Jens Arm <Jens.Arm@gmx.de> for pointing out.
- another bug why user-only mounts never worked:
  if ((nd.dentry->d_inode->i_uid != uid) || (!nd.dentry->d_inode->i_gid != gid)) {
  ...
  why the hell that (!nd.dentry had that strange ! before ? uh. uh. no more weed
  for today *g*
