Make MaxPendingReads configurable on SftpClient

[Copilot]

SFTP downloads of larger files freeze on Android/mobile devices due to the hardcoded MaxPendingReads = 100 in SftpFileStream. Having 100 concurrent in-flight SSH_FXP_READ requests overwhelms the SSH channel receive window on resource-constrained platforms.

Changes

• Add MaxPendingReads property to ISftpClient and SftpClient (default 100, minimum 1)
• Replace hardcoded const in SftpFileStream with an instance field passed through Open/OpenAsync
• All existing call sites in SftpClient forward the configured value

Usage

var client = new SftpClient(host, username, password);
client.MaxPendingReads = 10; // Reduce for constrained platforms
client.Connect();

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:

• d38977a820604547b8c8247a50a9dcf4
  • Triggering command: /usr/share/dotnet/dotnet /usr/share/dotnet/dotnet exec --runtimeconfig /home/REDACTED/work/SSH.NET/SSH.NET/test/Renci.SshNet.Tests/bin/Debug/net10.0/Renci.SshNet.Tests.runtimeconfig.json --depsfile /home/REDACTED/work/SSH.NET/SSH.NET/test/Renci.SshNet.Tests/bin/Debug/net10.0/Renci.SshNet.Tests.deps.json /home/REDACTED/work/SSH.NET/SSH.NET/test/Renci.SshNet.Tests/bin/Debug/net10.0/testhost.dll --port 41281 --endpoint 127.0.0.1:041281 --role client --parentprocessid 4546 --telemetryoptedin false (dns block)
• e8ec94cbed2742b79b6effd6a995b716
  • Triggering command: /usr/share/dotnet/dotnet /usr/share/dotnet/dotnet exec --runtimeconfig /home/REDACTED/work/SSH.NET/SSH.NET/test/Renci.SshNet.Tests/bin/Debug/net10.0/Renci.SshNet.Tests.runtimeconfig.json --depsfile /home/REDACTED/work/SSH.NET/SSH.NET/test/Renci.SshNet.Tests/bin/Debug/net10.0/Renci.SshNet.Tests.deps.json /home/REDACTED/work/SSH.NET/SSH.NET/test/Renci.SshNet.Tests/bin/Debug/net10.0/testhost.dll --port 41281 --endpoint 127.0.0.1:041281 --role client --parentprocessid 4546 --telemetryoptedin false (dns block)
• invalid
  • Triggering command: /usr/share/dotnet/dotnet /usr/share/dotnet/dotnet exec --runtimeconfig /home/REDACTED/work/SSH.NET/SSH.NET/test/Renci.SshNet.Tests/bin/Debug/net10.0/Renci.SshNet.Tests.runtimeconfig.json --depsfile /home/REDACTED/work/SSH.NET/SSH.NET/test/Renci.SshNet.Tests/bin/Debug/net10.0/Renci.SshNet.Tests.deps.json /home/REDACTED/work/SSH.NET/SSH.NET/test/Renci.SshNet.Tests/bin/Debug/net10.0/testhost.dll --port 41281 --endpoint 127.0.0.1:041281 --role client --parentprocessid 4546 --telemetryoptedin false (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)