very readable in my opinion.

strings, it's just the default because it's usually ok.

Make name_funcs_stack static.

the third argument: the second was being used
already.

default yet, I wanna play with it a bit more.

For those who don't know: asprintf() is an allocating sprintf.  The
first argument to it is a double indirection to char instead of a
single.

structure better.  I hope noone minds, and that it still works.  Steve?

it work like asprintf().

Fix bug which would free up a public key
twice if the verify callback tried to
continue after a signature failure.

instructions.