Patch upload progress (#267)

* Include the mod_* states in apache.modules for Debian hosts

* upload progress module for debian

apache/mod_upload_progress.sls

+{% from "apache/map.jinja" import apache with context %}
+
+{% if grains['os_family']=="Debian" %}
+include:
+  - apache
+
+libapache2-mod-upload-progress:
+  pkg.installed
+
+a2enmod upload_progress:
+  cmd.run:
+    - unless: ls /etc/apache2/mods-enabled/upload_progress.load
+    - order: 255
+    - require:
+      - pkg: libapache2-mod-upload-progress
+    - watch_in:
+      - module: apache-restart
+    - require_in:
+      - module: apache-restart
+      - module: apache-reload
+      - service: apache
+{% endif %}

apache/modules.sls

 
 include:
   - apache
+{%- set existing_states = salt['cp.list_states']() %}
+{%- for module in salt['pillar.get']('apache:modules:enabled', []) %}
+{%- set mod_state = 'apache.mod_{}'.format(module) %}
+{%- if mod_state in existing_states %}
+  - {{ mod_state }}
+{%- endif %}
+{%- endfor %}
 
 {% for module in salt['pillar.get']('apache:modules:enabled', []) %}
+{% if module not in existing_states %}
 a2enmod {{ module }}:
   cmd.run:
     - unless: ls /etc/apache2/mods-enabled/{{ module }}.load
       - module: apache-restart
       - module: apache-reload
       - service: apache
+{% endif %}
 {% endfor %}
 
 {% for module in salt['pillar.get']('apache:modules:disabled', []) %}