Vendor the external cookbooks

Knife-Zero doesn't include Berkshelf support, so vendoring everything in
the repo is convenient again

cookbooks/apache2/templates/default/mods/cache_disk.conf.erb

@@ -0,0 +1,23 @@
+<IfModule mod_cache_disk.c>
+  # cache cleaning is done by htcacheclean, which can be configured in
+  # /etc/default/apache2
+  #
+  # For further information, see the comments in that file,
+  # /usr/share/doc/apache2/README.Debian, and the htcacheclean(8)
+  # man page.
+
+  # This path must be the same as the one in /etc/default/apache2
+  CacheRoot /var/cache/apache2/mod_cache_disk
+
+  # This will also cache local documents. It usually makes more sense to
+  # put this into the configuration for just one virtual host.
+  CacheEnable disk /
+
+
+  # The result of CacheDirLevels * CacheDirLength must not be higher than
+  # 20. Moreover, pay attention on file system limits. Some file systems
+  # do not support more than a certain number of inodes and
+  # subdirectories (e.g. 32000 for ext3)
+  CacheDirLevels 2
+  CacheDirLength 1
+</IfModule>