Fix broken links (#2108)

Some documentation files were moved in #1872 which caused these links to be broken.

Signed-off-by: Wouter Born <github@maindrain.net>

developers/bindings/index.md

@@ -123,7 +123,7 @@ The `ThingManager` creates for each Thing a `ThingHandler` instance using a `Thi
 Therefore, it tracks all `ThingHandlerFactory`s from the binding.
 
 The `ThingManager` determines if the `Thing` is initializable or not.
-A `Thing` is considered as _initializable_ if all _required_ configuration parameters (cf. property _parameter.required_ in [Configuration Description](config-xml.html)) are available.
+A `Thing` is considered as _initializable_ if all _required_ configuration parameters (cf. property _parameter.required_ in [Configuration Description](../addons/config-xml.html)) are available.
 If so, the method `ThingHandler.initialize()` is called.
 
 Only Things with status (cf. [Thing Status](../../concepts/things.html#thing-status)) _UNKNOWN_, _ONLINE_ or _OFFLINE_ are considered as _initialized_ by the framework and therefore it is the handler's duty to assign one of these states sooner or later.
@@ -454,7 +454,7 @@ The Hue gateway is an IP device with an HTTP API, which communicates over the Zi
 In the openHAB model the Hue gateway is represented as a _Bridge_ with connected _Things_, that represent the Hue bulbs.
 _Bridge_ inherits from _Thing_, so that it also has _Channels_ and all other features of a thing, with the addition that it also holds a list of things.
 
-We have a FAQ, discussing [Thing, Bridge and Channel modelling](faq.html#structuring-things-and-thing-types).
+We have a FAQ, discussing [Thing, Bridge and Channel modelling](../addons/faq.html#structuring-things-and-thing-types).
 
 When implementing a binding with _Bridges_, the logic to communicate with the external system is often shared between the different `ThingHandler` implementations.
 In that case it makes sense to implement a handler for the _Bridge_ and delegate the actual command execution from the _ThingHandler_ to the _BridgeHandler_.
@@ -727,7 +727,7 @@ In the case that a `property` will be used to match the representation property
 updateProperty("uniqueId", uniquePropVal);
 ```
 
-Alternatively in the case that a `configuration parameter` will be used to match the auto discovery representation property, the parameter must be declared in either, a) the `thing-types.xml` file, or b) the `config-description` [XML file](config-xml.md).
+Alternatively in the case that a `configuration parameter` will be used to match the auto discovery representation property, the parameter must be declared in either, a) the `thing-types.xml` file, or b) the `config-description` [XML file](../addons/config-xml.md).
 And it must also be declared in the Thing handler's `Configuration` class:
 
 ```java
@@ -1016,4 +1016,4 @@ This is done by implementing the `getServices` method in your bridge handler:
 
 ## Frequently asked questions / FAQ
 
-Various binding related questions are answered in our [Binding development FAQ](faq.html).
+Various add-on related questions are answered in our [Add-on development FAQ](../addons/faq.html).

developers/bindings/thing-xml.md

@@ -197,7 +197,7 @@ There exist system-wide trigger channel types that are available by default:
 | rawrocker       | system.rawrocker | Can trigger `DIR1_PRESSED`, `DIR1_RELEASED`, `DIR2_PRESSED` and `DIR2_RELEASED` |
 
 In the following sections the declaration and semantics of tags, state descriptions and channel categories will be explained in more detail.
-For a complete sample of the thing types XML file and a full list of possible configuration options please see the [XML Configuration Guide](config-xml.html).
+For a complete sample of the thing types XML file and a full list of possible configuration options please see the [XML Configuration Guide](../addons/config-xml.html).
 
 ### Default Tags
 
@@ -522,7 +522,7 @@ A new discovery would then automatically find this Thing again and add it to the
 See also [Implementing a Discovery Service](index.md#representation-property)
 
 When comparing representation properties, the auto-ignore service checks for matches between the representation property of the newly discovered Thing, and both the properties and the configuration parameters of existing Things.
-If a configuration parameter will be used, then its respective `parameter` shall be declared in the XML `config-description` section or the `config-description` [XML file](config-xml.md):
+If a configuration parameter will be used, then its respective `parameter` shall be declared in the XML `config-description` section or the `config-description` [XML file](../addons/config-xml.md):
 
 ```xml
     <thing-type id="thingTypeId">

ui/building-pages.md

@@ -83,7 +83,7 @@ slots: ...
 ```
 
 - a **uid** (its Unique IDentifier)
-- a **props** structure describing its own properties; props define parameters and parameter groups following a subset of the configuration description schema found in bindings, services and throughout openHAB: see [Configuration Descriptions](/docs/developer/bindings/config-xml.html)
+- a **props** structure describing its own properties; props define parameters and parameter groups following a subset of the configuration description schema found in bindings, services and throughout openHAB: see [Configuration Descriptions](../developers/addons/config-xml.html)
 - a set of **tags**
 
 ## Widgets: Definition & Usage