SRV records changed to addr instead of node format

## Overview of the Issue

Previously SRV records looked like:
```
;; ANSWER SECTION:
debug.packager-api.query.admiral. 1 IN SRV 1 1 21748 ivy.node.staging-gce-us-east1.admiral.
debug.packager-api.query.admiral. 1 IN SRV 1 1 16620 quinn.node.staging-gce-us-east1.admiral.

;; ADDITIONAL SECTION:
ivy.node.staging-gce-us-east1.admiral. 1 IN A 10.128.0.8
quinn.node.staging-gce-us-east1.admiral. 1 IN A 10.142.0.40
```
but with 1.7.1 they now look like:
```
;; ANSWER SECTION:
debug.packager-api.query.admiral. 1 IN SRV 1 1 28945 0a800008.addr.staging-gce-us-east1.admiral.
debug.packager-api.query.admiral. 1 IN SRV 1 1 19605 0a8e0028.addr.staging-gce-us-east1.admiral.

;; ADDITIONAL SECTION:
0a800008.addr.staging-gce-us-east1.admiral. 1 IN A 10.128.0.8
0a8e0028.addr.staging-gce-us-east1.admiral. 1 IN A 10.142.0.40
```
#### Reproduction Steps

We had previously relied on the output to be in the format `.node..admiral` but now it looks like it's changed to `.addr..admiral`. I don't see anything in the CHANGELOG mentioning this, was it intentional or accidental? Can we choose the behavior?

### Consul info for both Client and Server

Client info

```
agent:
check_monitors = 0
check_ttls = 71
checks = 103
services = 71
build:
prerelease =
revision = 2cf0a3c8
version = 1.7.1
consul:
acl = disabled
known_servers = 3
server = false
runtime:
arch = amd64
cpu_count = 4
goroutines = 204
max_procs = 4
os = linux
version = go1.13.8
serf_lan:
coordinate_resets = 0
encrypted = true
event_queue = 0
event_time = 72
failed = 0
health_score = 0
intent_queue = 0
left = 0
member_time = 1197
members = 5
query_queue = 0
query_time = 1
```

Server info

```
agent:
check_monitors = 0
check_ttls = 6
checks = 6
services = 6
build:
prerelease =
revision = 2cf0a3c8
version = 1.7.1
consul:
acl = disabled
bootstrap = false
known_datacenters = 7
leader = false
leader_addr = 10.142.15.197:8300
server = true
raft:
applied_index = 19366355
commit_index = 19366355
fsm_pending = 0
last_contact = 36.245636ms
last_log_index = 19366355
last_log_term = 47
last_snapshot_index = 19359054
last_snapshot_term = 47
latest_configuration = [{Suffrage:Voter ID:5492e882-3ad4-af25-9b37-4e23b2ebf1f5 Address:10.142.15.198:8300} {Suffrage:Voter ID:ab3569f5-6fa5-c69e-94d4-d662d7738261 Address:10.142.15.197:8300} {Suffrage:Voter ID:63f20cf7-dffa-8890-3086-db5382449cf8
Address:10.142.15.199:8300}]
latest_configuration_index = 0
num_peers = 2
protocol_version = 3
protocol_version_max = 3
protocol_version_min = 0
snapshot_version_max = 1
snapshot_version_min = 0
state = Follower
term = 47
runtime:
arch = amd64
cpu_count = 1
goroutines = 188
max_procs = 1
os = linux
version = go1.13.8
serf_lan:
coordinate_resets = 0
encrypted = true
event_queue = 0
event_time = 72
failed = 0
health_score = 0
intent_queue = 0
left = 0
member_time = 1197
members = 5
query_queue = 0
query_time = 1
serf_wan:
coordinate_resets = 0
encrypted = true
event_queue = 0
event_time = 1
failed = 0
health_score = 0
intent_queue = 0
left = 0
member_time = 1297
members = 21
query_queue = 0
query_time = 1
```

### Operating system and Environment details

CentOS 7 on GCE

### Log Fragments

N/A