minor #8221 Documented the WebProfilerBundle configuration (javiereguiluz)

This PR was squashed before being merged into the 2.7 branch (closes #8221).

Discussion
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Documented the WebProfilerBundle configuration

Commits
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2a7eecd Documented the WebProfilerBundle configuration

Author: xabbuh

reference/configuration/web_profiler.rst

@@ -4,6 +4,71 @@
 WebProfilerBundle Configuration ("web_profiler")
 ================================================
 
+The WebProfilerBundle provides detailed technical information about each request
+execution and displays it in both the web debug toolbar and the profiler.
+
+.. caution::
+
+    The web debug toolbar is not available for responses of type ``StreamedResponse``.
+
+Configuration
+-------------
+
+* `toolbar`_
+* `position`_
+* `intercept_redirects`_
+* `excluded_ajax_paths`_
+* `verbose`_
+
+toolbar
+~~~~~~~
+
+**type**: ``boolean`` **default**: ``true``
+
+It enables and disables the toolbar entirely. Usually you set this to ``true``
+in the ``dev`` and ``test`` environments and to ``false`` in the ``prod``
+environment.
+
+position
+~~~~~~~~
+
+**type**: ``string`` **default**: ``bottom``
+
+It defines the location of the browser window where the toolbar is displayed.
+the only allowed values are ``bottom`` and ``top``.
+
+intercept_redirects
+~~~~~~~~~~~~~~~~~~~
+
+**type**: ``boolean`` **default**: ``false``
+
+If a redirect occurs during an HTTP response, the browser follows it automatically
+and you won't see the toolbar or the profiler of the original URL, only the
+redirected URL.
+
+When setting this option to ``true``, the browser *stops* before making any
+redirection and shows you the URL which is going to redirect to, its toolbar,
+and its profiler. Once you've inspected the toolbar/profiler data, you can click
+on the given link to perform the redirect.
+
+excluded_ajax_paths
+~~~~~~~~~~~~~~~~~~~
+
+**type**: ``string`` **default**: ``'^/(app(_[\\w]+)?\\.php/)?_wdt'``
+
+When the toolbar logs Ajax requests, it matches their URLs against this regular
+expression. If the URL matches, the request is not displayed in the toolbar. This
+is useful when the application makes lots of Ajax requests or they are heavy and
+you want to exclude some of them.
+
+verbose
+~~~~~~~
+
+**type**: ``boolean`` **default**: ``true``
+
+This option is **deprecated** and has no effect on the toolbar or the profiler,
+so you can safely remove it from your configuration.
+
 Full Default Configuration
 --------------------------
 
@@ -13,23 +78,14 @@ Full Default Configuration
 
         # app/config/config.yml
         web_profiler:
-
-            # DEPRECATED, it is not useful anymore and can be removed
-            # safely from your configuration
-            verbose:              true
-
-            # display the web debug toolbar at the bottom of pages with
-            # a summary of profiler info
             toolbar:              false
             position:             bottom
-
-            # gives you the opportunity to look at the collected data
-            # before following the redirect
-            intercept_redirects: false
-
-            # Exclude AJAX requests in the web debug toolbar for specified paths
+            intercept_redirects:  false
             excluded_ajax_paths:  ^/bundles|^/_wdt
 
+            # DEPRECATED, it can be removed safely from your configuration
+            verbose:              true
+
     .. code-block:: xml
 
         <!-- app/config/config.xml -->