Logging multirelay status on ntlmrelayx.py

[gabrielg5]

In order to better clarify the multirelay flag status, this PR adds a logging message stating so (triggered after #1676)

For example

┌──(xxx㉿XXXX)-[~/impacket/examples]
└─$ python ntlmrelayx.py -tf targets -smb2support -w --no-smb-server --no-wcf-server --no-raw-server
Impacket v0.12.0.dev1+20240807.21946.829239e3 - Copyright 2023 Fortra

[...]
[*] Setting up HTTP Server on port 80
[*] Multirelay enabled for HTTP server

or

┌──(xxx㉿XXXX)-[~/impacket/examples]
└─$ python ntlmrelayx.py -tf targets
Impacket v0.12.0.dev1+20240807.21946.829239e3 - Copyright 2023 Fortra

[...]
[*] Setting up HTTP Server on port 80
[*] Multirelay enabled for HTTP and SMB servers

or

┌──(xxx㉿XXXX)-[~/impacket/examples]
└─$ python ntlmrelayx.py -t 10.10.10.10
Impacket v0.12.0.dev1+20240807.21946.829239e3 - Copyright 2023 Fortra

[...]
[*] Multirelay disabled