wrong var name in code sample

[DartBot]

Originally opened as dart-lang/sdk#16616

This issue was originally filed by [email protected]

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https://api.dartlang.org/apidocs/channels/stable/#http_server/http_server

virtualServer should be virtualHost in the code sample

also requets -> requests

[DartBot]

<img src="https://avatars.githubusercontent.com/u/2108507?v=3" align="left" width="48" height="48"hspace="10"> Comment by dgrove

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Added Triaged label.

[DartBot]

<img src="https://avatars.githubusercontent.com/u/3276024?v=3" align="left" width="48" height="48"hspace="10"> Comment by anders-sandholm

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Added Area-Documentation label.

[DartBot]

<img src="https://avatars.githubusercontent.com/u/2164483?v=3" align="left" width="48" height="48"hspace="10"> Comment by kwalrath

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Removed Priority-Unassigned label.
Added Pkg-HttpServer label.

[DartBot]

<img src="https://avatars.githubusercontent.com/u/2164483?v=3" align="left" width="48" height="48"hspace="10"> Comment by kwalrath

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Removed Type-Defect, Area-Documentation labels.
Added Type-Documentation, Area-Library labels.