Multiple copies of host key via ssh_known_hosts.present

Description of Issue/Question

On:

• CentOS 6.10
• CentOS 7.6
• Arch
• RHEL 7.6
  (and presumably all others),

when using an ssh_known_hosts.present like such:

ssh_known_hosts.present:
  - name: '[fqdn.here.tld]:<portnum>,[ipv4.address.here]:<portnum>'
    enc: ssh-rsa
    hash_known_hosts: False
    key: "AAAA...=="
    user: root

it does not successfully detect that the key has been added - meaning every time the state is applied, the host key is added again. (Note: changing hash_known_hosts to True has no effect).

Per sshd(8), SSH_KNOWN_HOSTS FILE FORMAT section:

Hostnames is a comma-separated list of patterns...
(...)
A hostname or address may optionally be enclosed within ‘[’ and ‘]’ brackets then followed by ‘:’ and a non-standard port number

Setup

N/A

Steps to Reproduce Issue

See Description.

Versions Report

master:

Salt Version:
           Salt: 2018.3.3
 
Dependency Versions:
           cffi: 1.11.5
       cherrypy: unknown
       dateutil: Not Installed
      docker-py: Not Installed
          gitdb: Not Installed
      gitpython: Not Installed
          ioflo: Not Installed
         Jinja2: 2.8
        libgit2: 0.26.8
        libnacl: Not Installed
       M2Crypto: Not Installed
           Mako: Not Installed
   msgpack-pure: Not Installed
 msgpack-python: 0.5.6
   mysql-python: Not Installed
      pycparser: 2.17
       pycrypto: 2.6.1
   pycryptodome: Not Installed
         pygit2: 0.26.4
         Python: 3.4.9 (default, Aug 14 2018, 21:28:57)
   python-gnupg: Not Installed
         PyYAML: 3.11
          PyZMQ: 15.3.0
           RAET: Not Installed
          smmap: Not Installed
        timelib: Not Installed
        Tornado: 4.4.2
            ZMQ: 4.1.4
 
System Versions:
           dist: centos 7.6.1810 Core
         locale: UTF-8
        machine: x86_64
        release: 3.10.0-957.1.3.el7.x86_64
         system: Linux
        version: CentOS Linux 7.6.1810 Core

minion (centos 6):

Salt Version:
           Salt: 2018.3.3
 
Dependency Versions:
           cffi: Not Installed
       cherrypy: Not Installed
       dateutil: Not Installed
      docker-py: Not Installed
          gitdb: Not Installed
      gitpython: Not Installed
          ioflo: Not Installed
         Jinja2: 2.8.1
        libgit2: Not Installed
        libnacl: Not Installed
       M2Crypto: Not Installed
           Mako: Not Installed
   msgpack-pure: Not Installed
 msgpack-python: 0.4.6
   mysql-python: Not Installed
      pycparser: Not Installed
       pycrypto: 2.6.1
   pycryptodome: Not Installed
         pygit2: Not Installed
         Python: 2.7.13 (default, Mar 30 2018, 15:31:59)
   python-gnupg: Not Installed
         PyYAML: 3.11
          PyZMQ: 14.5.0
           RAET: Not Installed
          smmap: Not Installed
        timelib: Not Installed
        Tornado: 4.2.1
            ZMQ: 4.0.5
 
System Versions:
           dist: centos 6.10 Final
         locale: UTF-8
        machine: x86_64
        release: 2.6.32-754.10.1.el6.x86_64
         system: Linux
        version: CentOS 6.10 Final

(etc.)
(all minions are using 2018.3.3, centos 6 is using python 2.7, others are using 3.x)

Start with the implementation of the ssh_known_hosts.present state and reproduce the example using comma-separated bracketed hosts with a non-standard port. Check how existing known-host entries are matched, including both hash_known_hosts settings. Done means repeated state applications recognize the existing key and make no duplicate additions.