wheezy: need librrd2-dev from backports to be compatible with dovecot

roles/monitoring/tasks/collectd.yml

-- name: Install collectd dependencies
+- name: Add wheezy-backports to be compatible with Dovecot packages on Debian 7
+  apt_repository: repo='deb http://http.debian.net/debian wheezy-backports main'
+  when: ansible_distribution_release == 'wheezy'
+
+- name: Install collectd dependencies on wheezy from backports
+  apt: pkg={{ item }} state=installed default_release=wheezy-backports
+  with_items:
+    - libcurl4-openssl-dev
+    - librrd2-dev
+    - python-dev
+  when: ansible_distribution_release == 'wheezy'
+
+- name: Install collectd dependencies on distributions other than wheezy
   apt: pkg={{ item }} state=installed
   with_items:
     - libcurl4-openssl-dev
     - librrd2-dev
     - python-dev
+  when: ansible_distribution_release != 'wheezy'
 
 - name: Download collectd
   get_url: url=http://collectd.org/files/collectd-{{collectd_version}}.tar.gz

roles/news/tasks/selfoss.yml

 
 # only data/cache, data/favicons, data/logs, data/thumbnails, data/sqlite public/ should be writeable by httpd
 - name: Set selfoss permission
-  action: file path=/var/www/selfoss/{{ item }} permission=775
+  action: file path=/var/www/selfoss/{{ item }} mode=0775
   with_items:
     - data/cache
     - data/favicons

roles/xmpp/tasks/prosody.yml

 - name: Install Prosody from official repository
   apt: pkg=prosody update_cache=yes
 
+- name: Install lua-sec 0.5+
+  apt: pkg=lua-sec update_cache=yes
+  when: ansible_distribution_release == 'trusty' or ansible_distribution_release == 'jessie'
+
 - name: Add prosody user to ssl-cert group
   user: name=prosody groups=ssl-cert append=yes