Last month's canary for loop did not die in the coal mine of decrepit
toolchains. Make a note of this in STYLE.md so we know to start breeding
more of them. We can indeed declare index variables like it's 1999.

I haven't bothered to convert all of our for loops because that will be
tedious, but we can do it as we touch the code. Or if someone feels
really really bored.

BUG=47

Change-Id: Ib76c0767c1b509e825eac66f8c2e3ee2134e2493
Reviewed-on: https://boringssl-review.googlesource.com/8740
Reviewed-by: Adam Langley <agl@google.com>

They match the new style not the old EAY style now. They're also not
likely to be reformatted. It's just the legacy ASN.1 stuff now and we're
intentionally not doing much with those. (The old text was written back
before the SSL stack had been reformatted.)

Change-Id: I4852761b013e8c2688ebc7eaf4970afbdc69e858
Reviewed-on: https://boringssl-review.googlesource.com/8129
Reviewed-by: Steven Valdez <svaldez@google.com>
Reviewed-by: David Benjamin <davidben@google.com>

Change-Id: I0c9d86f188cd20d256620ccbb46546678714e081
Reviewed-on: https://boringssl-review.googlesource.com/6386
Reviewed-by: Adam Langley <agl@google.com>

Since we're able to render it fancy, may as well.

Change-Id: Ia1ab4b7ad0cdd78c8ffb75342ee62365843e7d5f
Reviewed-on: https://boringssl-review.googlesource.com/5810
Reviewed-by: Adam Langley <agl@google.com>