fix: enhance code comments

[threewebcode]

Enhance and tidy the code comments

[threewebcode]

@davecgh, Please help review

[coveralls]

Pull Request Test Coverage Report for Build 7256586442

Warning: This coverage report may be inaccurate.

We've detected an issue with your CI configuration that might affect the accuracy of this pull request's coverage report. To ensure accuracy in future PRs, please see these guidelines. A quick fix for this PR: rebase it; your next report should be accurate.

• 0 of 0 changed or added relevant lines in 0 files are covered.
• 999 unchanged lines in 10 files lost coverage.
• Overall coverage increased (+0.6%) to 56.622%

---

Files with Coverage Reduction	New Missed Lines	%
peer/peer.go	1	74.52%
netsync/blocklogger.go	9	0.0%
database/ffldb/db.go	25	91.67%
btcutil/gcs/builder/builder.go	28	68.04%
server.go	60	0.0%
blockchain/utxoviewpoint.go	93	73.76%
blockchain/chainio.go	170	61.25%
netsync/manager.go	187	0.0%
config.go	204	5.09%
blockchain/chain.go	222	73.38%
<!--	Total:	999		-->

Totals
Change from base Build 7227596643:	0.6%
Covered Lines:	28618
Relevant Lines:	50542

---

💛 - Coveralls

[threewebcode]

@davecgh, Please help review

[threewebcode]

@jcvernaleo The change set is updated with your review. Please take a look again.

[jcvernaleo]

@threewebcode I forgot to allow the github actions to run. Once those finish I'll merge.