Add example config with explanation

docs/example-config/.mage/config/environment/production.yml.dump-symlinks.txt

@@ -0,0 +1,43 @@
+#production
+deployment:
+  user: root
+  from: ./
+#  source:
+#    type: git
+#    repository: git://github.com/andres-montanez/Magallanes.git
+#    from: master
+#    temporal: /tmp/myAppClone
+  to: /var/www/vhosts/example.com/www
+  excludes:
+    - application/data/cache/twig/*
+releases:
+  enabled: true
+  max: 5
+  symlink: current
+  directory: releases
+# This option allows to dump the symlink with the TarGz strategy and use the symlink on the deployment host.
+# This is useful, if the files the symlink point to only exist on the deployment host and not on the host who runs the mage command.
+# The default value is false to keep bc.
+# See : http://linux.die.net/man/1/tar   -h, --dereference
+  dump-symlinks: true
+hosts:
+  - s01.example.com
+  - s02.example.com
+#  s02.example.com:
+#    deployment:
+#      user: toor
+#      to: /home/web/public
+#    releases:
+#      max: 10
+#    tasks:
+#      on-deploy:
+#        - privileges
+tasks:
+  pre-deploy:
+    - scm/update
+  on-deploy:
+    - symfony2/cache-warmup: { env: prod }
+    - privileges
+    - sampleTask
+    - sampleTaskRollbackAware
+  #post-deploy: