[ccan] [PATCH] make ccan/opt accept k, M suffixes for long-destined options

[Douglas Bagnall]

You perhaps don't want this one in, at least in its current state.

It makes ccan/opt accept 'k' and 'M' suffixes for arguments destined
to be stored in long or unsigned long integers.  That is, these all do
the same thing:

$ foo -x 5M
$ foo -x $((5 * 1024 * 1024))
$ foo -x 5242880
$ foo -x 5120k

Some reasons not to want it are that it assumes 'k' means 1024, when
1000 might be more useful in general; and that it comes with
absolutely no tests (or documentation).

OTOH, it is really useful if you are dealing with big numbers on the
command line and hate counting digits.

I can do tests and documentation if you like the idea.

Douglas
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