Adding multidomain certificates and more

[tgagor]

Hi,

I really liked your role and how it's simpler than original letsencrypt script.

I needed multidomain certificates and other features so:

• I added support for multidomain certs (trying to use current variable structure), ex:

  - name: "example.com"
    keypath: "{{ letsencrypt_keys_dir }}/example.com.key"
    certpath: "{{ letsencrypt_certs_dir }}/example.com.crt"
    multiple: true
    hosts:
      - example.com
      - www.example.com
  - name: "blog.example.com"
    keypath: "{{ letsencrypt_keys_dir }}/blog.example.com.key"
    certpath: "{{ letsencrypt_certs_dir }}/blog.example.com.crt"
    host: blog.example.com

this could probably be done better (without multiple variable - just checking for host/hosts variables but it was working fine and I didn't find time to fix this)

• certificates chaining for nginx (in renew-script)
• move cron to /etc/cron.d - this seems for me to be a better place than user cron,
• reorganise directories and permissions a little

Use it if you want :)

[andreaswolf]

I think this has mostly been integrated already, therefore I’m closing this PR. Thanks for bringing the topic up, tgagor :)