removed older copy of duplicated paragraph.

removed older copy of duplicated paragraph.
negated the descriptive sense of "frag" and "-N", which were clearly wrong.
changed instructions (which were bogus in the extreme) for allowing/preventing
    outgoing rsh/rlogin, rewording the paragraph so it applies to incoming
    connections so it actually both makes sense and tells the truth. It can
    be deleted instead if not relevant.

did not change the paragraph about loading multiple rules in one command,
    although this operation is now partially supported by loading from a
    command file.

I hope I'm not treading on anyone's toes here.