[ISSUE#662]capitalizing the first letter in comments and removing the unless comments for acl and msg trace feature codes.

[zongtanghu]

What is the purpose of the change

I have already capitalized the first letter in comments and removed the unless comments for acl and msg trace feature codes.

Brief changelog

The changed files is as follows.

Verifying this change

I have already verified.

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[coveralls]

Coverage increased (+0.07%) to 44.862% when pulling 28bb467 on zongtanghu:msg_track into ea8d517 on apache:msg_track.