Fossil

**    db_protect_only(X)    Remove all prior protections then set
**                          protections to only X.
**
** Each of these routines pushes the previous protection mask onto
** a finite-size stack.  Each should be followed by a call to
** db_protect_pop() to pop the stack and restore the protections that
** existed prior to the call.  The protection mask stack has a limited
** depth, so take care not to next calls too deeply.
**
** About Database Write Protection
** -------------------------------
**
** This is *not* a primary means of defending the application from
** attack.  Fossil should be secure even if this mechanism is disabled.
** The purpose of database write protection is to provide an additional