nmh depends on implementation details of ancient stdios (Re: nmh on HP-UX11 needs -DSCO_5_STDIO)

[matthew . hannigan]

Surely this delving into the innards of stdio should
not be necessary in 2001.

Despite the dire warnings in the source code, it
can't really make that much difference to performance.

And it is only a performance difference right?

Sorry no patch :-)