maxbufsize doesn't include JVMROUTESZ

    if (mconf->maxmesssize)
       maxbufsiz = mconf->maxmesssize;
    else {
       /* we calculate it */
       maxbufsiz = 9 + JVMROUTESZ;
       maxbufsiz = bufsiz + (mconf->maxhost * HOSTALIASZ) + 7;
       maxbufsiz = bufsiz + (mconf->maxcontext * CONTEXTSZ) + 8;
    }
    if (maxbufsiz< MAXMESSSIZE)
       maxbufsiz = MAXMESSSIZE;
    buff = apr_pcalloc(r->pool, maxbufsiz);