Merge branch 'master' into builtin-password-hashing

README.md

 
 The following steps are done on the remote server by `ssh`ing into it and running these commands.
 
-### 1. Install required packages
+### 1. Install required packages e.g `aptitude` is required on Debian
 
     apt-get install sudo
 

roles/common/tasks/letsencrypt.yml

+- name: Add group name ssl-cert for SSL certificates
+  group:
+    name: ssl-cert
+    state: present
+
 - name: Download LetsEncrypt release
   git: repo=https://github.com/letsencrypt/letsencrypt
        dest=/root/letsencrypt

roles/xmpp/files/etc_letsencrypt_postrenew_prosody.sh

+#!/bin/bash
+
+systemctl restart prosody.service

roles/xmpp/tasks/prosody.yml

 - name: Add prosody user to ssl-cert group
   user: name=prosody group=ssl-cert
 
+- name: Add cert postrenew task
+  copy: src=etc_letsencrypt_postrenew_prosody.sh dest=/etc/letsencrypt/postrenew/prosody.sh mode=0755
+
 - name: Create Prosody data directory
   file: state=directory path=/decrypted/prosody owner=prosody group=prosody