Add logging on active node when sending a snapshot to a follower (#636)

* Add a log line on active node when sending snapshot to a follower

* Add snap ID and peer ID to relevant log lines in sendLatestSnapshot; fix - use peer.ID instead of peer as a value in log line

* Add an INFO log line when opening a snapshot in sendLatestSnapshot

Add linter rules to ensure we don't accidentally emit metrics directl…

…y instead of through the compat package (#633)

Do not update leader last-contact when granting a pre-vote request (#609

)

* do not update leader last-contact when granting a pre-vote request

* fix data race and remove extra logs

udpate changelogs (#596)

* update changelogs to reflect v1.6.1

* update changelogs to reflect v1.7.0

Add reference use of Hashicorp Raft (#584)

* Update README.md

Add a reference use

* Update README.md

Update changelog for 1.6.0

NetworkTransport make pipelining configurable and default to max 2 in…

… flight. (#541)

* NetworkTransport make pipelining configurable and default to max 2 inflight

* Add PR link

* Fix net transport test

* Use constants instead of magic numbers to express the semantics

* Doc comment tweaks

Merge pull request #550 from hashicorp/jm/1.4.0

Adding changelog for 1.4.0

check if server is in configuration when receiving a voteRequest (#526)

* check if server is in configuration, and not have vote rights, when receiving a voteRequest

* change test term to 20 to reduce the chance that the test passes when the bug manifest

Co-authored-by: Nick Cabatoff <ncabatoff@hashicorp.com>

* non voter with higher term vote request would make the node step-down but don't grant a vote

* fix test to check we use the right term

* add more details in the comment and a reference to the PR

Co-authored-by: Nick Cabatoff <ncabatoff@hashicorp.com>

Improved election debug logs (#516)

When debugging elections in production you want to know what happened in
a particular term in order to identify what went wrong.

Add term= to all of the relevent debug logs

You also want to know which peers were contacted (their ID and their
address) and what the result from them was so you know why an election
was not won in a timely manner

Finally the log that just says "votes" in the message field seems
strange; improve the message.