(cherry picked from commit 3dddd508)

When reading through `cmd/tiller/tiller.go`, I noticed a comment around
`rootServer` mentions the usage of an `init` function. However, there is
no `init` function in this package. Update the comment to be more
accurate.

https://github.com/kubernetes/helm/pull/3183 added a keepalive to the Helm client of 30s period, while Tiller was never configured to permit this, keeping the default minimum keepalive period of 5 minutes, disconnecting any clients which ping more regularly than this.

This commit enforces a minimum that is lower than what Helm is configured for, preventing these disconnections, and thus fixes #3409.

Possibly fixes #3121. This forces idle connections to drop after 10 minutes

* fix(helm): add TLS params back

During a recent refactor, several TLS flags stopped being processed for
a few of the commands. This fixes those commands, and documents how to
set up TLS.

* fix(tiller): add stricter certificate verification

The older version of Tiller allowed a weaker set of certificate checks
than we intended. This version requires a client certificate, and then
requires that that certificate be signed by a known CA. This works
around the situation where a user could provide a self-signed
certificate.

add version flag to tiller binary

* TODO comment on tiller.go

This reverts commit 63be90dd.

When 'helm version --debug' is run, this will print the kubernetes server
version as well as the helm client and server versions.

Closes #1398

This adds a new configuration option to Tiller to limit the number of
records stored per release.

Tiller stores historical release information (helm history, helm
rollback). This makes it possible to set a maximum number of versions
per release.

To enable this feature, use `helm init --history-max NNN`. Note that
because of the restrictions on Deployment objects, you will have to
re-install Tiller to add a limit.

Along the way, I found an unreported bug in the Memory storage driver.
This fixes that bug and adds substantially more tests to catch
regressions.

Closes #2332

Adds a generic logging interface to importable packages.

This change introduces the concept of Rudders - pluggable modules that
Tiller communicates with via grpc, which allow to decouple orchestration
logic from Tiller into separate service.

This commit consists of simple Rudder implementation which does exactly
the same thing as built in Tiller orchestrator - it creates all k8s
objects from provided manifest without orchestrating them.

--experimental-release flag is introduced to enable this behaviour.

This change allows to use the service and tiller outside of the cluster.
Following commits will add Rudder to helm deployment.

RequireAndVerifyClientCert => VerifyClientCertIfGiven

Closes #2310

Adds `--tiller-namespace` flag and `TILLER_NAMESPACE` envvar
to use tiller in an alternate namespace.

closes #1418

Increases the default message size from 4MB to 10MB.

Closes #1072

This adds a Tiller CLI flag to override the default, and tests to
make sure that the default comes up as expected.

https://golang.org/doc/go1.4#canonicalimports