Cannot pass const strings into slapi_str2filter, since it can modify
    the contents.  I'm not sure why we haven't caught this earlier, but
    I believe it has something to do with the patch to make ds build on
    Fedora Core 4 with gcc4.  To do that, we turn off the -fwriteable-strings
    argument to gcc.  I suppose with it on, it moves those strings to
    some sort of writeable memory location.  With it off, constant strings
    are definitely in the data section.  There was one place in views that
    used a constant string, and a couple of places in the windows sync code.