[Patch, fortran] Use memcmp for string comparisons a bit more

[Thomas Koenig]

Hi Tobias,

>
> Somehow the commas and parentheses look odd. Shouldn't that be, e.g.,
> "or (for kind=4 strings) the ..."?

I committed as rev 197261 and 197262, with a slightly better worded
ChangeLog entry :-)

The wording is now

	If the strings
	compared have constant and equal lengths and
	the strings are kind=1, or, for kind=4 strings,
	the test is for (in)equality, use memcmp().

	Thomas