did this support etcd v3?

this is an issue I reported to Kelsey Hightower' CONFD, but it seems not active any more, and report here,
kelseyhightower#516

highlight of the issue:

it's a change on the new version, the prefix is not a joint one, instead, the prefix in template file will be overwritten by confd profile, which cause the configuration file failed with this new version.
code as below:

resource.go:
NewTemplateResource, new version:

if config.Prefix != "" {
        // tr.Prefix = config.Prefix
        if tr.Prefix == "" {
                tr.Prefix = config.Prefix

but in previews version, it's a joint prefix as below:
tr.prefix = filepath.Join("/", config.Prefix, tr.Prefix)

After upgrading my confd from v0.10.0 to v0.12.0, I seem to be hitting issues where some of the files created by the template do not contain the latest contents of etcd - it looks as though it's missing an update.

We have quite a lot of different templates monitoring a bunch of different prefixes and so there are quite a few updates going on.

Do you have recommendation of how best to diagnose/investigate this, and whether any changes between v0.10.0 and v0.12.1 leap out that might be the cause of these missed updates?

There is some problem in resource/template/resource.go : setVars()
etcd3 v3.0.14
confd v0.12.1 and v0.12.0

root@3aeecacf3a47:/etc# confd -backend etcdv3 -node https://etcd1.lan:2379 -client-ca-keys /etc/confd/certs/ca.pem -client-cert /etc/confd/certs/etcd-client.pem -client-key=/etc/confd/certs/etcd-client-key.pem -watch -log-level debug
2017-05-30T18:31:25+03:00 3aeecacf3a47 confd[640]: INFO Backend set to etcdv3
2017-05-30T18:31:25+03:00 3aeecacf3a47 confd[640]: INFO Starting confd
2017-05-30T18:31:25+03:00 3aeecacf3a47 confd[640]: INFO Backend source(s) set to https://etcd1.lan:2379
2017-05-30T18:31:25+03:00 3aeecacf3a47 confd[640]: DEBUG Loading template resources from confdir /etc/confd
2017-05-30T18:31:25+03:00 3aeecacf3a47 confd[640]: DEBUG Found template: /etc/confd/conf.d/confd.toml
2017-05-30T18:31:25+03:00 3aeecacf3a47 confd[640]: DEBUG Loading template resource from /etc/confd/conf.d/confd.toml
2017-05-30T18:31:25+03:00 3aeecacf3a47 confd[640]: DEBUG Retrieving keys from store
2017-05-30T18:31:25+03:00 3aeecacf3a47 confd[640]: DEBUG Key prefix set to /
2017-05-30T18:31:28+03:00 3aeecacf3a47 confd[640]: ERROR context deadline exceeded

/etc/confd/conf.d/confd.toml

[template]
src = "super.cfg.tmpl"
dest = "super.cfg"
keys = [
"/super/"
]

/etc/confd/templates/super.cfg.tmpl

{{range $svc := ls "/super/"}}
  {{$svc}}
{{end}}

data in etcd3 v3

/super
one
two
three

/super/one
one
one                                                        
                                                                                                                                                                                                   
/super/two
two
two