New function mpz_init_setbit

[Torbjörn Granlund]

  > I suppose that the name should be mpz_set_2exp, for consistency?
  >

  I think that every function that initialize an mpz_t should have mpz_init_ as a prefix.
  And since mpz_init_setbit would be equivalent to mpz_init followed by mpz_setbit,
  I proposed this name.

I meant mpz_init_set_2exp.

But mpz_init_setbit is fine to.


-- 
Torbjörn
Please encrypt, key id 0xC8601622