Fix Cadente SSL fallback for additional ListeningHosts

[CypherPotato]

Motivation

• Restore the prior compatibility behavior where a builder-level UseSsl(...) call supplies SSL configuration for all configured hosts so that secondary ListeningHosts are not silently started as plaintext when they lack per-host SslOptions.

Description

• In src/Http/Hosting/HttpServerHostContextBuilder.cs updated Build() to propagate the primary builder listeningHost.SslOptions to other entries in configuration.ListeningHosts when those entries have SslOptions == null using configuredHost.SslOptions ??= sslOptions.
• The change preserves explicit per-host SSL configuration by only filling null SslOptions and does not alter behavior when hosts already define their own SSL options.

Testing

• Ran the project build: dotnet build src/Sisk.Core.csproj -c Release --ignore-failed-sources, which completed successfully with only repository/SourceLink warnings and no build errors.

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Codex Task

[chatgpt-codex-connector]

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