> Once a paper has been published in a mailing, never (ever)
> re-use its number for something that is not bit-wise identical.

For the record, I had been granted special permission to silently swap
the R0 stand-in in the mailing with a proper R0 edition. Unfortunately,
I took too long to produce the proper R0, so Hal has asked for this to
be made into an R1:

https://dedi5.nedprod.com/static/files/other/P1631R1.pdf

Which is identical to the R0 linked earlier, except it is now called R1.

Niall