[Feature] Using actual endpoint string in the config to display warning/error, instead of all IP address

[PeterDaveHello]

It's harder to confirm which endpoint is failing when they are all IP address, you'd need to find the reverseIP to locate the issue

[2023-02-10 15:27:56]  WARN parallel resolver: test resolve of upstream server failed: can't resolve request via upstream server 92.249.39.1:853: x509: certificate has expired or is not yet valid: current time 2023-02-10T15:27:56Z is after 2022-08-23T14:34:49Z                                                                                                                                                                                                                        
[2023-02-10 15:27:56]  WARN parallel resolver: test resolve of upstream server failed: can't resolve request via upstream server https://92.249.39.1:443/dns-query: http return content type should be 'application/dns-message', but was ''
[2023-02-10 15:28:05]  WARN parallel resolver: test resolve of upstream server failed: can't resolve request via upstream server 185.228.168.9:853: EOF