Reviewed-by: NAndy Polyakov <appro@openssl.org>

Several files #include stdio.h and don't need it.
Also, per tjh, remove BN_COUNT
Reviewed-by: NEmilia Kasper <emilia@openssl.org>

that use it.

knock-on work than expected - they've been extracted into a patch
series that can be completed elsewhere, or in a different branch,
before merging back to HEAD.

Submitted by: Nils Larsch

is itself experimental, and in addition may cause execution to break on
existing openssl "bugs" that previously were harmless or at least
invisible.

One problem that looked like a problem in bn_recp.c at first turned
out to be a BN_mul bug.  An example is given in bn_recp.c; finding
the bug responsible for this is left as an exercise.

but the BN code had some problems that would cause failures when
doing certificate verification and some other functions.

Submitted by: Eric A Young from a C2Net version of SSLeay
Reviewed by: Mark J Cox
PR: