Upgrade epi-utility-tcpproxy to Essentials v2 (4-series)

[Copilot]

Upgrades the plugin from Essentials v1.x (3-series, net35) to v2.x (4-series, net472) using an SDK-style project, while preserving v1 support on the maintenance/1x branch via shared .cs files and #if SERIES4 guards.

Repo structure changes

• Added epi-utility-tcpproxy.4Series.sln at repo root
• Added src/epi-utility-tcpproxy.4Series.csproj (SDK-style, net472, PepperDashEssentials 2.28.1)
• Added src/Directory.Build.props / src/Directory.Build.targets (CPLZ + NuGet package output)
• Removed legacy 3-series-only files (PDT.EssentialsPluginTemplate.EPI.csproj, .3Series.sln, .nuspec, packages.config) — preserved on maintenance/1x

Code migration

• Factory: #if SERIES4 sets MinimumEssentialsFrameworkVersion to "2.28.1" (v2) or "1.6.4" (v1); Debug.Console → Debug.LogVerbose/Debug.LogError
• Device: Debug.Console → Debug.LogInformation under #if SERIES4 guards

public EssentialsPluginTemplateFactory()
{
#if SERIES4
    MinimumEssentialsFrameworkVersion = "2.28.1";
#else
    MinimumEssentialsFrameworkVersion = "1.6.4";
#endif
    TypeNames = new List<string>() { "TcpProxy" };
}

Key metadata

PackageId	PepperDash.Essentials.Plugin.TcpProxy
PackageProjectUrl	https://github.com/PepperDash/epi-utility-tcpproxy
Essentials version	PepperDashEssentials 2.28.1
v1 maintenance	maintenance/1x branch — run git push origin maintenance/1x to publish

maintenance/1x was committed locally from main; the tooling constraint prevented pushing it automatically. Please push manually.

Warning

Firewall rules blocked me from connecting to one or more addresses (expand for details)

I tried to connect to the following addresses, but was blocked by firewall rules:

• crl.entrust.net
  • Triggering command: /usr/bin/dotnet dotnet build src/epi-utility-tcpproxy.4Series.csproj (dns block)
  • Triggering command: /usr/bin/dotnet dotnet restore --no-dependencies /home/REDACTED/work/epi-utility-tcpproxy/epi-utility-tcpproxy/epi-utility-tcpproxy.4Series.sln --packages /tmp/codeql-scratch-cd6142c61faedaa9/dbs/csharp/working/packages /p:DisableImplicitNuGetFallbackFolder=true --verbosity normal /p:TargetFrameworkRootPath=/tmp/codeql-scratch-cd6142c61faedaa9/dbs/csharp/working/emptyFakeDotnetRoot /p:NetCoreTargetingPackRoot=/tmp/codeql-scratch-cd6142c61faedaa9/dbs/csharp/working/emptyFakeDotnetRoot /p:AllowMissingPrunePackageData=true (dns block)
• ocsp.entrust.net
  • Triggering command: /usr/bin/dotnet dotnet build src/epi-utility-tcpproxy.4Series.csproj (dns block)
  • Triggering command: /usr/bin/dotnet dotnet restore --no-dependencies /home/REDACTED/work/epi-utility-tcpproxy/epi-utility-tcpproxy/epi-utility-tcpproxy.4Series.sln --packages /tmp/codeql-scratch-cd6142c61faedaa9/dbs/csharp/working/packages /p:DisableImplicitNuGetFallbackFolder=true --verbosity normal /p:TargetFrameworkRootPath=/tmp/codeql-scratch-cd6142c61faedaa9/dbs/csharp/working/emptyFakeDotnetRoot /p:NetCoreTargetingPackRoot=/tmp/codeql-scratch-cd6142c61faedaa9/dbs/csharp/working/emptyFakeDotnetRoot /p:AllowMissingPrunePackageData=true (dns block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to the custom allowlist in this repository's Copilot coding agent settings (admins only)