Kernel: Implement unix domain sockets with SOCK_DGRAM

Also unbind sockets on close

kernel/include/kernel/Networking/UNIX/Socket.h

@@ -17,6 +17,8 @@ namespace Kernel
 		static BAN::ErrorOr<BAN::RefPtr<UnixDomainSocket>> create(SocketType, ino_t, const TmpInodeInfo&);
 
 	protected:
+		virtual void on_close_impl() override;
+
 		virtual BAN::ErrorOr<long> accept_impl(sockaddr*, socklen_t*) override;
 		virtual BAN::ErrorOr<void> connect_impl(const sockaddr*, socklen_t) override;
 		virtual BAN::ErrorOr<void> listen_impl(int) override;
@@ -47,7 +49,7 @@ namespace Kernel
 
 		struct ConnectionlessInfo
 		{
-
+			BAN::String peer_address;
 		};
 
 	private: