Fix/analysis server

Fix: Use hive.go/network

* partial readme

* adds readme to the relay-checker and refactors it a little bit

Refactors web API

* fix: use netutil to check UDP connection

* Make ping private

* use public address from local

* add missing import

* update hive.go version

* repeat sends directly in protocol

* retry ping to ensure verified

* Apply suggestions from code review

Co-Authored-By: Luca Moser <moser.luca@gmail.com>

Co-authored-by: Luca Moser <moser.luca@gmail.com>

*  Implement relay-check

*  Rename files and minor tweaks

*  Move print function in to caller

*  Enable cli settings

* migrates to hive.go database package

* review fixes

* alias types and vars from hive.go's db package

* Move database to tempdir to prevent sideeffects in tests

* fix import

Co-authored-by: Wolfgang Welz <welzwo@gmail.com>

* Add known peers to getNeighbors request #151

* Check if autopeering discovery is enabled #151

* feat: add netutil package

* use IsTemporaryError

* remove unused import

* 

 adds open port check

* Use gossip.server to check port

* Use same messages in gossip and autopeering

* Give correct error message when unreachable

Co-authored-by: Wolfgang Welz <welzwo@gmail.com>

* refactors errors

* fmt packages/model/error.go