Add basic blacklist functionality

[xXxsomebodyoncetoldmexXx]

Example usecase
./suo5 -t 'https://example.com/suo5.aspx' -l '127.0.0.1:1080' -B 'polling.oastify.com,portswigger.net'

[INFO] 06-17 16:38 starting tunnel at 0.0.0.0:1080

[Tunnel Info]
Target:  http://example.com/suo5.aspx
Proxy:   socks5://0.0.0.0:1080
Mode:    half

[INFO] 06-17 16:38 creating a test connection to the remote target
[INFO] 06-17 16:38 start connection to 127.0.0.1:0
[DBUG] 06-17 16:38 recv dial response from server: length: 7
[INFO] 06-17 16:38 successfully connected to 127.0.0.1:0
[DBUG] 06-17 16:38 recv socks5 reply: 0
[DBUG] 06-17 16:38 local conn closed, 127.0.0.1:0
[INFO] 06-17 16:38 congratulations! everything works fine
[DBUG] 06-17 16:38 remote readwriter closed, 127.0.0.1:0
[INFO] 06-17 16:38 connection closed, 127.0.0.1:0
[SUCC] 06-17 16:38 drop connecction to polling.oastify.com:443
[SUCC] 06-17 16:38 drop connecction to polling.oastify.com:443
[SUCC] 06-17 16:39 drop connecction to portswigger.net:443

[zema1]

抱歉这些天一直没有评论，这个功能挺好的，可以在再改一下我合了

[xXxsomebodyoncetoldmexXx]

Hi, i change a bit so that it match the project coding style, now the syntax is like this
./suo5 -d --nh -t 'http://192.168.30.28/suo5.aspx' -l '0.0.0.0:1080' -E "google.com" -E "stackoverflow" -E "amazon.com"