[BusyBox] docs fixups for modutils directory programs

[Robert P. J. Day]

insmod:

	online docs don't mention option "-q" for quiet operation

modprobe:

	online docs don't mention a whole whack of options:

	while ((opt = getopt(argc, argv, "acdklnqrst:vVC:")) != -1) {

rmmod:

	online docs mention only "-a" option, but source code contains

	while ((n = getopt(argc, argv, "a")) != EOF) {
        switch (n) {
            case 'w':       // --wait
                flags &= ~O_NONBLOCK;
                break;
            case 'f':       // --force
                flags |= O_TRUNC;
                break;
            case 'a':

  any mention of the "-w" or "-f" options?


rday