(X86 servers) DISABLE_X86_FT is a bit mask used to inhibit the use
    of certain X86 processor features by the operating system.
    It is used to decide which variant of the SYSTEM_PRIMITIVES execlet
    gets loaded.  Setting all bits (disabling the use of all optional
    features) results in SYSTEM_PRIMITIVES_0 being loaded.

    Following is the bit definition:

    Bit   Definition

    0     If 1, do not use the XSAVEOPT instruction.

    1     If 1, do not use the RDFSBASE, WRFSBASE, RDGSBASE or WRGSBASE
          instructions.

    2     If 1, do not provide software mitigation against the Intel MDS
          vulnerabilities.

    DISABLE_x86_FT is a STATIC parameter.