jaseemabid Add a short name attribute to peers for human friendly output
```
$ sudo wg show

interface: wg0
  public key: 8Lv...s=
  private key: (hidden)
  listening port: 5555
  fwmark: 0xca6c

peer: TqV...xWQ=
  endpoint: ...
  allowed ips: ...
  latest handshake: ...
  transfer: ...
  name: jabid.in

peer: ubKn...yM=
  allowed ips: 10.0.0.2/32
```

Checklist

- [✓] Set and update name with config file
- [✓] Set and update name with CLI interface
- [✓] Implement the functionality in kernel module
- [✗] Implement the functionality in userspace implementation
- [✗] Implement and test removing name attribute
Latest commit 544e59b Jan 29, 2019