Add missing networking switches

[gewarren]

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Document Details

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• ID: bfcfc815-a1d9-fcf3-ec45-0379ca35412d
• Version Independent ID: d778f279-fc56-01e8-3882-b452db0536ed
• Content: Networking config settings - .NET Core
• Content Source: docs/core/run-time-config/networking.md
• Product: dotnet-core
• GitHub Login: @gewarren
• Microsoft Alias: gewarren

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Associated WorkItem - 560865

[antonfirsov]

• DOTNET_SYSTEM_NET_SOCKETS_INLINE_COMPLETIONS , DOTNET_SYSTEM_NET_SOCKETS_THREAD_COUNT - Advanced, Unix-specific Socket perf switches added in .NET 5
• DOTNET_SYSTEM_NET_HTTP_ENABLEACTIVITYPROPAGATION - Diagnostics stuff for HttpClient
• DOTNET_SYSTEM_NET_HTTP_SOCKETSHTTPHANDLER_HTTP2UNENCRYPTEDSUPPORT - H2C in 3.1, removed in .NET 5
• DOTNET_SYSTEM_NET_HTTP_SOCKETSHTTPHANDLER_ALLOWLATIN1HEADERS - The thing added in SocketsHttpHandler: Add a switch to allow non-ascii headers corefx#42978. 3.1-only
• DOTNET_SYSTEM_NET_HTTP_SOCKETSHTTPHANDLER_HTTP3DRAFTSUPPORT - Likely internal