Tell sshd not to detach into the background.
Tell sshd not to detach into the background.

This makes it easier for systemd to track it and avoids race conditions such as
this one:

  systemd[1]: PID file /run/sshd.pid not readable (yet?) after start.
  systemd[1]: Failed to start SSH Daemon.
  systemd[1]: Unit sshd.service entered failed state.
  systemd[1]: sshd.service holdoff time over, scheduling restart.
  systemd[1]: Stopping SSH Daemon...
  systemd[1]: Starting SSH Daemon...
  sshd[2315]: Server listening on 0.0.0.0 port 22.
  sshd[2315]: Server listening on :: port 22.
  sshd[2335]: error: Bind to port 22 on 0.0.0.0 failed: Address already in use.
  sshd[2335]: error: Bind to port 22 on :: failed: Address already in use.
  sshd[2335]: fatal: Cannot bind any address.
  systemd[1]: Started SSH Daemon.

SymbiFlow/nixpkgs,NixOS/nixpkgs,NixOS/nixos,NixOS/nixos,NixOS/nixos,NixOS/nixpkgs,andreassalomonsson/nixos,SymbiFlow/nixpkgs,NixOS/nixpkgs,NixOS/nixos,triton/triton,NixOS/nixpkgs,NixOS/nixpkgs,SymbiFlow/nixpkgs,NixOS/nixpkgs,triton/triton,triton/triton,NixOS/nixpkgs,andreassalomonsson/nixos,SymbiFlow/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,SymbiFlow/nixpkgs,SymbiFlow/nixpkgs,SymbiFlow/nixpkgs,andreassalomonsson/nixos,NixOS/nixpkgs,SymbiFlow/nixpkgs,NixOS/nixos,SymbiFlow/nixpkgs,SymbiFlow/nixpkgs,triton/triton,NixOS/nixpkgs,NixOS/nixos,NixOS/nixpkgs,NixOS/nixpkgs,andreassalomonsson/nixos,NixOS/nixpkgs,SymbiFlow/nixpkgs,triton/triton,SymbiFlow/nixpkgs,andreassalomonsson/nixos,NixOS/nixpkgs,triton/triton,andreassalomonsson/nixos,triton/triton,triton/triton,SymbiFlow/nixpkgs