[tlbuild] patches from Debian

[Nelson H. F. Beebe]

Peter Breitenlohner <peb at mppmu.mpg.de> asks:

>> ...
>> Is mktemp sufficiently portable?
>> 
>> Quoting from the Autoconf manual (11.15 Limitations of Usual Tools):
>>      Shell scripts can use temporary files safely with `mktemp', but it
>>      does not exist on all systems.
>> ...

I run about 40 flavors of Unix here at math.utah.edu, and just checked
all of them.  The only one without a native mktemp is the old SGI IRIX
MIPS; even Minix has native mktemp.

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