DART-247 Modify rule S4830: Add Dart language

[antonioaversa]

DART-247

Review

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[pierre-loup-tristant-sonarsource]

LGTM. Have a look at the improvement suggestion I made before merging.

[pierre-loup-tristant-sonarsource]

This part could be improved:

Suggested change

	include::../../common/fix/code-rationale.adoc[]
	:cert_method_name: badCertificateCallback
	include::../../common/fix/code-rationale-override.adoc[]
	The certificate validation gets disabled by implementing a `badCertificateCallback` that always return `true`. It is highly recommended to use the original implementation and to avoid any bypass.

[antonioaversa]

Indeed, "empty" is not exact as the callback actually has a return true, at very least, in the case of Dart.

Unlike in the suggestion above, I have kept the include::../../common/fix/code-rationale.adoc[] (The following code contains examples of disabled certificate validation.), since it still applies to Dart as to any other language, and also to keep the languages as aligned as possible.

[sonarqube-next]

Quality Gate passed for 'rspec-tools'

Issues
0 New issues
0 Fixed issues
0 Accepted issues

Measures
0 Security Hotspots
No data about Coverage
No data about Duplication

See analysis details on SonarQube

[sonarqube-next]

Quality Gate passed for 'rspec-frontend'

Issues
0 New issues
0 Fixed issues
0 Accepted issues

Measures
0 Security Hotspots
No data about Coverage
No data about Duplication

See analysis details on SonarQube

[pierre-loup-tristant-sonarsource]

LGTM