char[] BackSlashesToSlashes(char[] s) {
        char[] ret;
        foreach (c; s) {
                if (c == '\\') {
                        ret ~= '/';
                } else {
                        ret ~= c;
                }
        }
        return ret;
        //
        // this, and string.replace cause segfaults...
        //
        //return cast(char[])(s.map!( c => c == '\\' ? '/' : c ).array());
}