PHHIVE Hive,
      HCELL_INDEX Cell,
      BOOLEAN Unlink

Routine Description:

    Actually free the storage for the specified cell.  We will first
    remove it from its parent's child key list, then free all of its
    values, then the key body itself.


    Hive - pointer to hive control structure for hive of interest

    Cell - index for cell to free storage for (the target)

    Unlink - if TRUE, target cell will be removed from parent cell's
             subkeylist, if FALSE, it will NOT be.

Return Value: