Allow specifying local ip. And use any by default instead of loopback.

[asdacap]

Fixes #5565

• Fix local ip not used to configure tcp listener.
• When resolving local ip, if not specified, use any ip instead of loopback.

Types of changes

What types of changes does your code introduce?

• Bugfix (a non-breaking change that fixes an issue)

Testing

Requires testing

• Yes
• No

If yes, did you write tests?

• Yes
• No

Notes on testing

• Tested with nc command as in the issue. Seems to work.
• I'm getting incoming connection when not specifying any ip or specifying my correct local ip.
• posdao test passed, sync hive test passed.

[benaadams]

Not sure about Any by default; loopback means its closed to the Internet whereas Any would open it up by default?

[asdacap]

Well... yea. Thats the point. Thats the default behaviour of go's net package, and therefore geth. Thats actually what we are currently using for TCP server, since we don't specify local ip before this.

[benaadams]

And any exciting JsonRpc's need to use .JwtSecretFile?

[asdacap]

Not sure what you mean by that.