* [p2p/pex] connect to more than 10 peers

also, remove DefaultMinNumOutboundPeers because a) I am not sure it's
needed b) it's super confusing

look closely

```
maxPeers := sw.config.MaxNumPeers - DefaultMinNumOutboundPeers
if maxPeers <= sw.peers.Size() {
  sw.Logger.Info("Ignoring inbound connection: already have enough peers", "address", inConn.RemoteAddr().String(), "numPeers", sw.peers.Size(), "max", maxPeers)
```

we print maxPeers = config.MaxPeers - DefaultMinNumOutboundPeers. So we
may not have enough peers even though we say we have enough.

Refs #2130

* update spec

* replace MaxNumPeers with MaxNumInboundPeers/MaxNumOutboundPeers

Refs #2130

* update changelog

* make max rpc conns formula visible to users

* update spec

* docs: note max outbound peers excludes persistent

Threshold Multisignature implementation

Refs #1916

* fixing issue 2015

* Remove comments for code review

* Update tests

* clist: Speedup detachNext() and detachPrev()

We used unnecessary function calls, defers, and extra mutexes.
These are not our friends for writing fast code in our libs.

* Remove more defers from clist functions

* Add more benchmarks

All functions in cmap have just one code path. Thus there is not a reason
to use defer statements.

* mempool: Keep cache hashmap and linked list in sync

This removes bugs with the linked list being full, but hashmap empty

* address PR comments

* switch clist back to list

Add missing changelog entry

Refs #1954

* libs: Remove usage of custom Fmt, in favor of fmt.Sprintf

Closes #2193

* Fix bug that was masked by custom Fmt!

* remove gogoproto from tools

because it's not a binary

* update protobuf version to 3.6.1 in `make get_protoc`

* update libs/common/types.pb.go and rpc/grpc/types.pb.go

* fix app tests

* add json2wal & fix wal2json

* fix bug

* Update main.go

* add wal2JsonTest file

* Delete wal2JsonTest

* crypto: Add compact bit array for intended usage in the multisig

This is in a separate PR for ease of review.

* (squash this) add comment

This adds an ADR entry addressing the implementation of a `ProposeTx`
method in the ABCI proposed in #1776. Fundamentally, this proposal gives
some control of block proposals to the application. The initial use case is
to support the Minimal Viable Plasma specification.

* ADR: Proposal for multisignature encoding

This proposal is partially tied to the resolution of #1957.

* Change title to Encoding standard for multisignatures

* ADR: Change multisigs ADR now that amino must be used for pubkeys

* Address PR comments

docs: fix links & other improvements

speed up some tests. ref #2038

This is in a separate PR for ease of review.

adr: chain-versions

adr: protocol versioning

[ADR] ABCI Validators

Merge pull request #2152 from tendermint/release/v0.23.0

Release/v0.23.0

change ABCI header to match Tendermint exactly

Now that Tendermint Amino will be compatible with proto3, the Header in ABCI
should exactly match the Tendermint header - they will then be encoded
identically in ABCI and in Tendermint Core.

Refs #265

Bucky/merge 0.23.0 to develop

- use cmn.Fingerprint and %X

Signatures are now []byte, which saves on the number of bytes after
amino encoding

(squash this) address Ismail's comment

add proposer address to block's Header

- state.MakeBlock takes a proposerAddr
- validateBlock only checks that the ProposerAddress is in the validator
  set
- fix raceyness from bad proposer test:
  - use privValidator to get the proposer address (instead of racy
    state)
  - note we had to remove the test that checked the correct proposer was
    included for higher rounds because we don't have a good way to test
    this with multiple consensus states and not using the
    privValidator.Address while calling createProposalBlock was a hack!

Refs #1134

Validation:

- ignored in block.ValidateBasic since it's stateful information
- checked in blockExec.ValidateBlock