Kernel: Use Userspace<T> for the bind syscall, and implementation

Author: https://github.com/bgianfo
Commit: 02660b5d60
Pull-request: https://github.com/SerenityOS/serenity/pull/3062
Reviewed-by: https://github.com/awesomekling

Kernel/Syscalls/socket.cpp

@@ -63,7 +63,7 @@ int Process::sys$socket(int domain, int type, int protocol)
     return fd;
 }
 
-int Process::sys$bind(int sockfd, const sockaddr* address, socklen_t address_length)
+int Process::sys$bind(int sockfd, Userspace<const sockaddr*> address, socklen_t address_length)
 {
     if (!validate_read(address, address_length))
         return -EFAULT;