This handles a bug where we may start a container successfully, yet we
fail due to retries and startContainer not being idempotent call.

Here, we ensure that when starting a container fails with 500 error,
the retry succeeds if container was started successfully.

close file handle when FileRotator object will closed. Fixes https://github.com/hashicorp/nomad/issues/6309 (#6323)

Fix upstreams docs link

Fix `volume_mount` attribute in the docs and formatting

The default ulimit for open files on macOS is really small (256),
which leads to "too many open files" errors during plugin launches if
you're running unit tests in `drivers/docker`. Recommend setting
`ulimit -n 1024`.

manage dev deps in vagrant

Allow dash in environment variable names

ci: ignore nested pkgs in GOTEST_PKGS_EXCLUDE

- In script checks, ensure we're running `Exec` against the new running
  allocation and not the earlier stopped one.
- In script checks, allow `Exec` calls to error due to lack of pty when
  we use the exec to kill the task.
- In `utils.go/RegisterAllocs`, force query for allocations to wait on
  wait index returned by registration call.

On macOS, `os.TempDir` returns a symlinked path under `/var` which is
outside of the directories shared into the VM used for Docker, and
that fails tests using Docker that need that mount. If we expand the
symlink to get the real path in `/private`, we're in the shared
folders and can safely mount them.

website: document Quota field in ns payloads

fix 'nomad namespace apply' help message

The auto-generation of TOC wasn’t working because the
“auto-linking header tags” described here doesn’t work
if the file isn’t Markdown:
https://github.com/hashicorp/middleman-hashicorp#auto-linking-header-tags

Named arguments need to preceed positional arguments.

website: Link to 0.10.0-beta1 release

Start of docs for group level service and network stanza.

docs: mention task field for checks

Docs: Added alloc_exec and alloc_node_exec capabilities

These were added in https://github.com/hashicorp/nomad/commit/4f7bd68f5ca9f330a894bfb4375b87f786e1e7a3

Tweak wording in changelog to match other entries.

docs: add more detail to connect stanzas

When multiple developers are working on e2e testing, it helps to be
able to identify which infrastructure belongs to which Nomad SHA and
which developer. This adds tags to the EC2 instances.