net: don't try to set TCP_NODELAY on local Unix sockets.

[mmeeks]

Change-Id: Ic0f720554080a01b7a46abbffda023834016c0ea

• Resolves: #
• Target version: master

Summary

TODO

• ...

Checklist

• Code is properly formatted
• All commits have Change-Id
• I have run tests with make check
• I have issued make run and manually verified that everything looks okay
• Documentation (manuals or wiki) has been updated or is not required

[Ashod]

Thanks @mmeeks. Looks reasonable. (Though I wish we never had Unix sockets to begin with.)

[thebearon]

Android/iOS app builds fail with this in SocketPoll::insertNewFakeSocket(...):

  /home/collabora/jenkins/workspace/github_android_online_co-23.05/net/Socket.cpp:668:18: error: no matching function for call to 'create'
          socket = StreamSocket::create<StreamSocket>(std::string(), fd, true, websocketHandler);
                   ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  /home/collabora/jenkins/workspace/github_android_online_co-23.05/net/Socket.hpp:1199:37: note: candidate function template not viable: requires at least 5 arguments, but 4 were provided
      static std::shared_ptr<TSocket> create(std::string hostname, const int fd, Type type, bool isClient,
                                      ^