OPTIONAL
SYNOPSIS
        void swap(object obj, int flags = 0)

DESCRIPTION
        Swap out an object. This efun is only used for system internal
        debugging and can cause a crash.

        <flags> can be given to specify which parts of <obj> to swap.
        It is a bitmask of the following:

            1: Swap program
            2: Swap variables

        The default (also when 0 given) is both (3).

HISTORY
        LDMud 3.6.4 introduced the second argument.