Increase BUFSIZ to 8192

[Poul-Henning Kamp]

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In message <20150514072155.GT37063 at funkthat.com>, John-Mark Gurney writes:

>Since you apprently missed my original reply, I said that we shouldn't
>abuse BUFSIZ for this work, and that it should be changed in mdXhl.c...

Say what ?

BUFSIZ is used entirely appropriately in MDXFileChunk():  For reading
a file into an algorithm.

If in stead of open(2), fopen(3) had been used, the exact same thing
would happen, but using malloc space rather than stack space.


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