Make all config values configurable

And use a standard scheme for variable/key naming

recipes/default.rb

@@ -59,7 +59,7 @@ user node["strfry"]["user"] do
   shell "/bin/bash"
 end
 
-directory node["strfry"]["db_path"] do
+directory node["strfry"]["config"]["db"] do
   owner node["strfry"]["user"]
   group node["strfry"]["group"]
   mode "0755"
@@ -70,15 +70,7 @@ template "/etc/strfry.conf" do
   mode "0644"
   owner node["strfry"]["user"]
   group node["strfry"]["group"]
-  variables config: {
-    db_path: node["strfry"]["db_path"],
-    bind: node["strfry"]["bind_ip"],
-    real_ip_header: node["strfry"]["real_ip_header"],
-    port: node["strfry"]["port"],
-    nofiles: node["strfry"]["nofiles"],
-    info: node["strfry"]["info"],
-    policy_path: node["strfry"]["policy_path"]
-  }
+  variables config: node["strfry"]["config"]
   notifies :restart, "service[strfry]", :delayed
 end