Kernel: Zero-initialize LocalSocket::m_address

It was possible to read uninitialized kernel memory via getsockname().
Of course, kmalloc() is a good boy and scrubs new allocations with 0xBB
so all you got was a bunch of 0xBB.

Kernel/Net/LocalSocket.h

@@ -91,7 +91,7 @@ class LocalSocket final : public Socket, public InlineLinkedListNode<LocalSocket
 
  bool m_bound { false };
  bool m_accept_side_fd_open { false };
- sockaddr_un m_address;
+ sockaddr_un m_address { 0, { 0 } };
 
  DoubleBuffer m_for_client;
  DoubleBuffer m_for_server;