Add support for --link

Author: mhutter

defaults/main.yml

@@ -2,6 +2,7 @@
 volumes: []
 labels: []
 ports: []
+links: []
 enabled: yes
 masked: no
 state: started

templates/unit.j2

@@ -12,7 +12,7 @@ Requires=docker.service
 EnvironmentFile={{ sysconf_dir }}/{{ name }}
 {% endif %}
 ExecStartPre=-/usr/bin/docker rm -f {{ name }}
-ExecStart=/usr/bin/docker run --name {{ name }} --rm {% if env is defined %}--env-file {{ sysconf_dir }}/{{ name }} {% endif %}{{ params('v', volumes) }}{{ params('p', ports) }}{{ params('l', labels) }}{{ args | default('') |trim }} {{ image }} {{ cmd | default('') | trim }}
+ExecStart=/usr/bin/docker run --name {{ name }} --rm {% if env is defined %}--env-file {{ sysconf_dir }}/{{ name }} {% endif %}{{ params('v', volumes) }}{{ params('p', ports) }}{{ params('-link', links) }}{{ params('l', labels) }}{{ args | default('') |trim }} {{ image }} {{ cmd | default('') | trim }}
 ExecStop=/usr/bin/docker stop {{ name }}
 
 SyslogIdentifier={{ name }}