As a follow up to https://boringssl-review.googlesource.com/#/c/6340, this change expands a comment to note the reason for clearing a flag that I missed. Change-Id: Ib3cfecbb330f0ae7c46bf44286f4e6b407159fe8 Reviewed-on: https://boringssl-review.googlesource.com/6393 Reviewed-by: Adam Langley <agl@google.com>kris/onging/CECPQ3_patch15