* fixes locks not getting unlocked

* only hold the lock in DropNeighbor while deleted the neighbor entry

* log connection failed error

* fixes tests

* fix close order

* return closed error

* fix tests

* do not close send queue explicitly

* Use buffered connection for gossip

* fix wrong timeout

* Encode length in big endian

*  Improve debug logging

* feat: add netutil package

* use IsTemporaryError

* remove unused import

* fix: use queue for neighbor connection

* refactor: do not request transactions via event

* fix: remove unused connection

* chore: fix linter warnings

* feat: improve gossip events and logs

* fix: log after connection is closed