This fixes Issue 1 by allowing the user to set the maximum line length.
It does slightly break the similarity with HaskellNet, which uses the
*Port suffix to specify a port for each connection, but it seems like
the only sensible way to do it, really. I opted not to keep the *Port
functions in because the proliferation of functions doing basically the
same thing would be too much, I think.
Very minimal -- basically copying the header sections from HaskellNet so
that it's easy to see where the function would belong were it part of
HaskellNet itself.
