NAME set_bit - set a specific bit in a bitfield

    SYNOPSIS
    string set_bit(string bitfield, int bitnum)

    DESCRIPTION
    Sets a bit with the number 'bitnum' in a specifically coded string 'bitfield'. The bitfield string is a string consisting of writable characters. Each character represents six bits.

    The 'bitfield' string is automatically extended to satisfy the setting of bits outside the current string size.

    CAVEAT
    There is a maximum bitindex number which can be changed in config.h in the gamedriver source. This constant is normally 1200.