about GOPRIVATE, sumdb and proxy?

[xie cui]

AFAIK, if we configure the GOPRIVATE, then the proxy and sumdb will be ignore.

```

GOPRIVATE='github.com/the-pepe-federation/ethermint'

```

but still

why still verify in sumdb, and still need proxy.

[xie cui]

I think I have found the reason. 

Because the GONOSUMDB is default to GOPRIVATE， but when GONOSUMDB has already a value, the GOPRIVATE will not set to GONOSUMDB automately.