WARN [runner/nolint] Found unknown linters in //nolint directives: gotype

This reverts commit 1cf6712a36.

* types: memoize height/round in commit instead of first vote

* types: commit.ValidateBasic in VerifyCommit

* types: new CommitSig alias for Vote

In preparation for reducing the redundancy in Commits, we introduce the
CommitSig as an alias for Vote. This is non-breaking on the protocol,
and minor breaking on the Go API, as Commit now contains a list of
CommitSig instead of Vote.

* remove dependence on ToVote

* update some comments

* fix tests

* fix tests

* fixes from review

* privval: more info in errors

* wal: change Debug logs to Info

* wal: log and return error on corrupted wal instead of panicing

* fail: Exit right away instead of sending interupt

* consensus: FAIL before handling our own vote

allows to replicate #3089:
- run using `FAIL_TEST_INDEX=0`
- delete some bytes from the end of the WAL
- start normally

Results in logs like:

```
I[2019-02-03|18:12:58.225] Searching for height module=consensus wal=/Users/ethanbuchman/.tendermint/data/cs.wal/wal height=1 min=0 max=0
E[2019-02-03|18:12:58.225] Error on catchup replay. Proceeding to start ConsensusState anyway module=consensus err="failed to read data: EOF"
I[2019-02-03|18:12:58.225] Started node module=main nodeInfo="{ProtocolVersion:{P2P:6 Block:9 App:1} ID_:35e87e93f2e31f305b65a5517fd2102331b56002 ListenAddr:tcp://0.0.0.0:26656 Network:test-chain-J8JvJH Version:0.29.1 Channels:4020212223303800 Moniker:Ethans-MacBook-Pro.local Other:{TxIndex:on RPCAddress:tcp://0.0.0.0:26657}}"
E[2019-02-03|18:12:58.226] Couldn't connect to any seeds module=p2p
I[2019-02-03|18:12:59.229] Timed out module=consensus dur=998.568ms height=1 round=0 step=RoundStepNewHeight
I[2019-02-03|18:12:59.230] enterNewRound(1/0). Current: 1/0/RoundStepNewHeight module=consensus height=1 round=0
I[2019-02-03|18:12:59.230] enterPropose(1/0). Current: 1/0/RoundStepNewRound module=consensus height=1 round=0
I[2019-02-03|18:12:59.230] enterPropose: Our turn to propose module=consensus height=1 round=0 proposer=AD278B7767B05D7FBEB76207024C650988FA77D5 privValidator="PrivValidator{AD278B7767B05D7FBEB76207024C650988FA77D5 LH:1, LR:0, LS:2}"
E[2019-02-03|18:12:59.230] enterPropose: Error signing proposal module=consensus height=1 round=0 err="Error signing proposal: Step regression at height 1 round 0. Got 1, last step 2"
I[2019-02-03|18:13:02.233] Timed out module=consensus dur=3s height=1 round=0 step=RoundStepPropose
I[2019-02-03|18:13:02.233] enterPrevote(1/0). Current: 1/0/RoundStepPropose module=consensus
I[2019-02-03|18:13:02.233] enterPrevote: ProposalBlock is nil module=consensus height=1 round=0
E[2019-02-03|18:13:02.234] Error signing vote module=consensus height=1 round=0 vote="Vote{0:AD278B7767B0 1/00/1(Prevote) 000000000000 000000000000 @ 2019-02-04T02:13:02.233897Z}" err="Error signing vote: Conflicting data"
```

Notice the EOF, the step regression, and the conflicting data.

* wal: change errors to be DataCorruptionError

* exit on corrupt WAL

* fix log

* fix new line

* p2p/pex: failing test

* p2p/conn: add stopMtx for FlushStop and OnStop

* changelog

* switch from fork (tendermint/btcd) to orig package (btcsuite/btcd); also

 - remove obsolete check in test `size != -1` is always true
 - WIP as the serialization still needs to be wrapped

* WIP: wrap signature & privkey, pubkey needs to be wrapped as well

* wrap pubkey too

* use "github.com/ethereum/go-ethereum/crypto/secp256k1" if cgo is
available, else use "github.com/btcsuite/btcd/btcec" and take care of
lower-S when verifying

Annoyingly, had to disable pruning when importing
github.com/ethereum/go-ethereum/ :-/

* update comment

* update comment

* emulate signature_nocgo.go for additional benchmarks:
592bf6a59c/crypto/signature_nocgo.go (L60-L76)

* use our format (r || s) in lower-s form when in the non-cgo case

* remove comment about using the C library directly

* vendor github.com/btcsuite/btcd too

* Add test for the !cgo case

* update changelog pending

Closes #3162 #3163
Refs #1958, #2091, tendermint/btcd#1

in the attempt to fix https://circleci.com/gh/tendermint/tendermint/43165

also

    code is simplified by running gofmt -s .
    remove unused vars
    enable linters we're currently passing
    remove deprecated linters

in https://github.com/tendermint/tendermint/pull/3209

> Implement a check for the blacklisted low order points, ala the X25519 has_small_order() function in libsodium

(#3010 (comment))
resolves first half of #3010

Before: Unexpected tx response from proxy during recheck\n Expected: {r.CheckTx.Data}, got: {memTx.tx}
After: Unexpected tx response from proxy during recheck\n Expected: {memTx.tx}, got: {tx}

Closes #3214

Because there's nothing worse than having to copy/paste a link from a
web page to navigate to it 😁

As per conversation here: https://github.com/tendermint/tendermint/pull/3218#discussion_r251364041

This is the result of running the following code on the repo:

```bash
find . -name '*.go' | grep -v 'vendor/' | xargs -n 1 goimports -w
```

* add go-deadlock tool to help detect deadlocks

Run it with `make test_with_deadlock`. After it's done, use Git to
cleanup `git checkout .`

Link: https://github.com/sasha-s/go-deadlock/
Replaces https://github.com/tendermint/tendermint/pull/3148

* add a target to cleanup changes

Fixes #3179

so if we did not index the last block (because of panic or smth else), we index it during replay

Closes #3186

Distinguish between user events and internal consensus events

- links to issues
 - fix a few markdown glitches
 - inline code
 - etc

* add ResetTestRootWithChainID

* modify chainid

Merge master back to develop

Release/v0.29.1

fix halting issue

Closes #3037

Closes #3180

* docs: update pubsub ADR

* third version

Closes #3192.

* close peer's connection to avoid fd leak

Fixes #2967

* rename peer#Addr to RemoteAddr

* fix test

* fixes after Ethan's review

* bring back the check

* changelog entry

* write a test for switch#acceptRoutine

* increase timeouts? :(

* remove extra assertNPeersWithTimeout

* simplify test

* assert number of peers (just to be safe)

* Cleanup in OnStop

* run tests with verbose flag on CircleCI

* spawn a reading routine to prevent connection from closing

* get port from the listener

random port is faster, but often results in

```
panic: listen tcp 127.0.0.1:44068: bind: address already in use [recovered]
        panic: listen tcp 127.0.0.1:44068: bind: address already in use

goroutine 79 [running]:
testing.tRunner.func1(0xc0001bd600)
        /usr/local/go/src/testing/testing.go:792 +0x387
panic(0x974d20, 0xc0001b0500)
        /usr/local/go/src/runtime/panic.go:513 +0x1b9
github.com/tendermint/tendermint/p2p.MakeSwitch(0xc0000f42a0, 0x0, 0x9fb9cc, 0x9, 0x9fc346, 0xb, 0xb42128, 0x0, 0x0, 0x0, ...)
        /home/vagrant/go/src/github.com/tendermint/tendermint/p2p/test_util.go:182 +0xa28
github.com/tendermint/tendermint/p2p.MakeConnectedSwitches(0xc0000f42a0, 0x2, 0xb42128, 0xb41eb8, 0x4f1205, 0xc0001bed80, 0x4f16ed)
        /home/vagrant/go/src/github.com/tendermint/tendermint/p2p/test_util.go:75 +0xf9
github.com/tendermint/tendermint/p2p.MakeSwitchPair(0xbb8d20, 0xc0001bd600, 0xb42128, 0x2f7, 0x4f16c0)
        /home/vagrant/go/src/github.com/tendermint/tendermint/p2p/switch_test.go:94 +0x4c
github.com/tendermint/tendermint/p2p.TestSwitches(0xc0001bd600)
        /home/vagrant/go/src/github.com/tendermint/tendermint/p2p/switch_test.go:117 +0x58
testing.tRunner(0xc0001bd600, 0xb42038)
        /usr/local/go/src/testing/testing.go:827 +0xbf
created by testing.(*T).Run
        /usr/local/go/src/testing/testing.go:878 +0x353
exit status 2
FAIL    github.com/tendermint/tendermint/p2p    0.350s
```

Merge master to develop

Release/v0.29.0

* update changelog and upgrading

* add note about max voting power in abci spec

* update version

* changelog

* spec: specify when MerkleRoot is on hashes

* remove unnecessary hash methods

* update changelog

* fix test

* base verifier: bc->bv and check chainid

* improve some comments

* comments in dynamic verifier

* fix comment in doc about BaseVerifier

It requires the validator set to perfectly match.

* failing test for #2862

* move errTooMuchChange to types. fixes #2862

* changelog, comments

* ic -> dv

* update comment, link to issue

- fixes #3008
- reactor requires encoded messages are less than maxMsgSize
- requires size of tx + amino-overhead to not exceed maxMsgSize

* types: dont hash entire ConsensusParams

* update encoding spec

* update blockchain spec

* spec: consensus params hash

* changelog

* more proposer priority tests

 - test that we don't reset to zero when updating / adding
 - test that same power validators alternate

* add another test to track / simulate similar behaviour as in #2960

* address some of Chris' review comments

* address some more of Chris' review comments

* temporarily pushing branch with the following changes:
The total power might change if:
   - a validator is added
   - a validator is removed
   - a validator is updated

Decrement the accums (of all validators) directly after any of these events
(by the inverse of the change)

* Fix 2960 by re-normalizing / scaling priorities to be in bounds of total
power, additionally:

 - remove heap where it doesn't make sense
 - avg. only at the end of IncrementProposerPriority instead of each
   iteration
 - update (and slightly improve)
   TestAveragingInIncrementProposerPriorityWithVotingPower to reflect
   above changes

* Fix 2960 by re-normalizing / scaling priorities to be in bounds of total
power, additionally:

 - remove heap where it doesn't make sense
 - avg. only at the end of IncrementProposerPriority instead of each
   iteration
 - update (and slightly improve)
   TestAveragingInIncrementProposerPriorityWithVotingPower to reflect
   above changes

* fix tests

* add comment

* update changelog pending & some minor changes

* comment about division will floor the result & fix typo

* Update TestLargeGenesisValidator:
 - remove TODO and increase large genesis validator's voting power
accordingly

* move changelog entry to P2P Protocol

* Ceil instead of flooring when dividing & update test

* quickly fix failing TestProposerPriorityDoesNotGetResetToZero:

 - divide by Ceil((maxPriority - minPriority) / 2*totalVotingPower)

* fix typo: rename getValWitMostPriority -> getValWithMostPriority

* test proposer frequencies

* return absolute value for diff. keep testing

* use for loop for div

* cleanup, more tests

* spellcheck

* get rid of using floats: manually ceil where necessary

* Remove float, simplify, fix tests to match chris's proof (#3157)

* update btcd fork for v0.1.1

* changelog