* swarm/network: bump network id for 0.4 release

* swarm/network: bump bzz protocol version

* swarm/docs: migration document v0.3 to v0.4

* swarm/storage/feed: gofmt lookup_test.go

swarm/storage: remove traces for put/get/set (#1389)

* swarm/storage: remove traces for put/get/set

* swarm/storage: remove Has traces

swarm/storage/localstore: add gc metrics, disable flaky test

swarm/storage/localstore: fix broken metric (#1373)

p2p/protocols: count different messages (#1374)

cmd/swarm: disable snapshot create test due to constant flakes (#1376)

swarm/network: remove redundant goroutine (#1377)

swarm/network: add want delay timer to syncing (#1367)

swarm/network: synchronise peer.close() (#1369)

swarm/api: integrate tags to count chunks being split and stored
swarm/api/http: integrate tags in middleware for HTTP `POST` calls and assert chunks being calculated and counted correctly
swarm: remove deprecated and unused code, add swarm hash to DoneSplit signature, remove calls to the api client from the http package

* swarm/chunk: add tags backend to chunk package

swarm/network: measure how many chunks a node delivers (#1358)

* swarm/shed: remove metrics fields from DB struct

* swarm/schunk: add String methods to modes

* swarm/storage/localstore: add metrics and traces

* swarm/chunk: unknown modes without spaces in String methods

* swarm/storage/localstore: remove bin number from pull subscription metrics

* swarm/storage/localstore: add resetting time metrics and code improvements

cmd/swarm/swarm-smoke: improve smoke tests (#1337)

swarm/network: remove dead code (#1339)

swarm/network: remove FetchStore and SyncChunkStore in favor of NetStore (#1342)

* swarm/network: fix data races in TestInitialPeersMsg test

* swarm/network: add Kademlia.Saturation method with lock

* swarm/network: add Hive.Peer method to safely retrieve a bzz peer

* swarm/network: remove duplicate comment

* p2p/testing: prevent goroutine leak in ProtocolTester

* swarm/network: fix data race in newBzzBaseTesterWithAddrs

* swarm/network: fix goroutone leaks in testInitialPeersMsg

* swarm/network: raise number of peer check attempts in testInitialPeersMsg

* swarm/network: use Hive.Peer in Hive.PeerInfo function

* swarm/network: reduce the scope of mutex lock in newBzzBaseTesterWithAddrs

* swarm/storage: disable TestCleanIndex with race detector

swarm/storage/feed: add context handling/cancellation to Swarm Feeds lookup, fix bad hint lookup bug (#19353)

* swarm/storage/feed/lookup: Add context handling/forwarding

* swarm/storage/feed/lookup: Add test to catch bad hint

* swarm/storage/feed/lookup: Added context cancellation test

* swarm/api: fix file descriptor leak in NewTestSwarmServer

Swarm storage (localstore) was not closed. That resulted a
"too many open files" error if `TestClientUploadDownloadRawEncrypted`
was run with `-count 1000`.

* cmd/swarm: speed up StartNewNodes() by parallelization

Reduce cluster startup time from 13s to 7s.

* swarm/api: disable flaky TestClientUploadDownloadRawEncrypted with -race

* swarm/storage: disable flaky TestLDBStoreCollectGarbage (-race)

With race detection turned on the disabled cases often fail with:
"ldbstore_test.go:535: expected surplus chunk 150 to be missing, but got no error"

* cmd/swarm: fix process leak in TestACT and TestSwarmUp

Each test run we start 3 nodes, but we did not terminate them. So
those 3 nodes continued eating up 1.2GB (3.4GB with -race) after test
completion.

6b6c4d1c changed how we start clusters
to speed up tests. The changeset merged together test cases
and introduced a global cluster. But "forgot" about termination.

Let's get rid of "global cluster" so we have a clear owner of
termination (some time sacrifice), while leaving subtests to use the
same cluster.

swarm/network:   hive bug: needed shallow peers are not sent to nodes beyond connection's proximity order (#19326)

* swarm/network: fix hive bug not sending shallow peers

-  hive bug: needed shallow peers were not sent to nodes beyond connection's proximity order
- add extensive protocol exchange tests for initial subPeersMsg-peersMsg exchange
- modify bzzProtocolTester to allow pregenerated overlay addresses

* swarm/network: attempt to fix hive persistance test

* swarm/network: fix TestHiveStatePersistance (#1320)

* swarm/network: remove trace lines from the hive persistance test

* address PR review comments

* swarm/network: address PR comments on TestInitialPeersMsg

 * eliminate *testing.T argument from bzz/hive protocoltesters
 * add sorting (only runs in test code) on peersMsg payload
 * add random (0 to MaxPeersPerPO) peers for each po
 * add extra peers closer to pivot than control

* cmd/swarm, p2p, swarm: Enable ENR in binary/execadapter

* cmd/p2p/swarm: Remove comments + config.Enode nomarshal

* p2p/simulations: Remove superfluous error check

* p2p/simulation: Move init enode comment

* swarm, p2p/simulations, cmd/swarm: Use nodekey in binary record sign

* swarm/network, swarm/pss: Dervice bzzkey

* swarm/pss: Remove unused function

* swarm/network: Store swarm private key in simulation bucket

* swarm/pss: Shorten TextProxNetwork shortrunning test timeout

* swarm/pss: Increase prox test timeout

* swarm/pss: Increase timeout slightly on shortrunning proxtest

* swarm/network: Simplify bucket instantiation in servicectx func

* p2p/simulations: Tcpport -> udpport

* swarm/network, swarm/pss: Simplify + correct lock in servicefunc sim

* swarm/network: Cleanup after rebase on extract swarm enode new

* p2p/simulations, swarm/network: Make exec disc test pass

* swarm/network: Prune ye olde comment

* swarm/pss: Correct revised bzzkey method call

* swarm/network: Clarify comment about privatekey generation data

* swarm/pss: Fix syntax errors after rebase

* swarm/network: Rename misleadingly named method

(amend commit to trigger ci - attempt 5)

* swarm/network/simulation: test cases refactored

* swarm/pss: minor refactoring

* swarm/simulation: UploadSnapshot updated

* swarm/network: style fix

* swarm/pss: bugfix

* cmd/swarm, p2p, swarm: Enable ENR in binary/execadapter

* cmd/p2p/swarm: Remove comments + config.Enode nomarshal

* p2p/simulations: Remove superfluous error check

* p2p/simulation: Move init enode comment

* swarm/api: Check error in config test

* swarm, p2p/simulations, cmd/swarm: Use nodekey in binary record sign

* cmd/swarm: Make nodekey available for swarm api config