[doc, fortran] PATCH: address broken web references

[Gerald Pfeifer]

On Mon, 15 Mar 2004, Toon Moene wrote:
>> Toon, I prefer not to commit this on my own, because you may want to
>> resolve some of the problems differently.
>>
>> Would you mind reviewing this and apply it to mainline and on the 3.4
>> and 3.3 branches (as far as it applies there)?
> Yes, but I need some time for it.  I hope I can give it attention this
> week - is that OK ?

Sure, definitely!

(It would be great to have these applied, possibly with modifications,
a few days before the release of 3.4.0 so that I can make another round
of checking.)

Gerald