fix some comment

[zhiqiangxu]

Thanks. Can you please squash your commits into a single one and use a proper commit message?

Done.

[guggero]

Still two commits and the message should say what the commit changes, not what the developer did when creating the commit.

[zhiqiangxu]

Still two commits and the message should say what the commit changes, not what the developer did when creating the commit.

Another squash is done:)

[coveralls]

Pull Request Test Coverage Report for Build 8433093311

Details

• 3 of 3 (100.0%) changed or added relevant lines in 2 files are covered.
• 10 unchanged lines in 2 files lost coverage.
• Overall coverage decreased (-0.02%) to 56.868%

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Files with Coverage Reduction	New Missed Lines	%
btcutil/gcs/gcs.go	1	81.25%
peer/peer.go	9	73.49%
<!--	Total:	10		-->

Totals
Change from base Build 8433036656:	-0.02%
Covered Lines:	29422
Relevant Lines:	51737

---

💛 - Coveralls