Log websocket IP addresses and server host:port

[roguh]

• Log host:port
• Log client IP for every websocket message received

Example:

$ mtplvcap -debug server
[0000]  INFO usb: found: ...
[0000]  INFO usb: found: ...
[0000]  WARN mtp: detected more than 1 device
[0000]  INFO mtp: opening the detected Nikon .....
[0000]  INFO main: server started on http://localhost:42839
[0000]  INFO main: started
[0000] DEBUG lv: manufacturer = NIKON, product = NIKON ..., serialnumber = ...
[0000] DEBUG lv: model didn't match, falling back to the generic model 
[0000]  INFO lv: HandleStream 127.0.0.1:40964: websocket client connected
[0000]  INFO lv: HandleStream 127.0.0.1:40974: websocket client connected
[0000]  INFO lv: HandleControl 127.0.0.1:40980: websocket client connected
[0001]  INFO lv: getting available resolutions
[0001]  INFO lv: available resolutions (higher is larger): [1 2 3]
[0001]  INFO lv: automatically use the largest choice: 3
[0002]  INFO lv: HandleControl 127.0.0.1:40994: websocket client connected
[0005] DEBUG lv: HandleControl 127.0.0.1:40994: set rate limit: 30
[0006] DEBUG lv: HandleControl 127.0.0.1:40994: disable rate limit
[0008] ERROR lv: HandleControl 127.0.0.1:40994: failed to read a message: websocket: close 1001 (going away)
[0008]  INFO http: GET /control 127.0.0.1:40994

The http GET logs are also logging IP addresses.