- Unexport MaxLoopPad and LoopAlign; associated comments updated
- Remove commented-out C code
- Replace C-style /**/ code comments with single-line comments

Change-Id: I51bd92a05b4d3823757b12efd798951c9f252bd4
Reviewed-on: https://go-review.googlesource.com/104795
Run-TryBot: Iskander Sharipov <iskander.sharipov@intel.com>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>