Add generic documentation to hook scripts

Issue #790
Signed-off-by: Michal Čihař <michal@cihar.com>

docs/admin/config.rst

@@ -425,6 +425,8 @@ POST_UPDATE_SCRIPTS
 List of scripts which are allowed as post update scripts. The script needs to be
 later enabled in the :ref:`component`.
 
+.. seealso:: :ref:`processing`
+
 .. setting:: PRE_COMMIT_SCRIPTS
 
 PRE_COMMIT_SCRIPTS
@@ -468,6 +470,8 @@ POST_COMMIT_SCRIPTS
 List of scripts which are allowed as post commit scripts. The script needs to be
 later enabled in the :ref:`component`.
 
+.. seealso:: :ref:`processing`
+
 .. setting:: POST_PUSH_SCRIPTS
 
 POST_PUSH_SCRIPTS
@@ -478,6 +482,8 @@ POST_PUSH_SCRIPTS
 List of scripts which are allowed as post push scripts. The script needs to be
 later enabled in the :ref:`component`.
 
+.. seealso:: :ref:`processing`
+
 .. setting:: REGISTRATION_CAPTCHA
 
 REGISTRATION_CAPTCHA

docs/admin/continuous.rst

@@ -212,8 +212,28 @@ delay, see :djadmin:`commit_pending`.
 
 .. _processing:
 
+Processing repository with scripts
+----------------------------------
+
+You can customize way how Weblate manipulates with repository by set of
+scripts. These include :guilabel:`Post-update script`, :guilabel:`Pre-commit
+script`, :guilabel:`Post-commit script` and :guilabel:`Post-push script` and
+are briefly described in :ref:`component`.
+
+Their naming quite clearly tells when given script is executed. The commit
+related scripts always get one parameter with full path to the translation file
+which has been changed.
+
+.. seealso::
+
+    :setting:`POST_UPDATE_SCRIPTS`,
+    :setting:`PRE_COMMIT_SCRIPTS`,
+    :setting:`POST_COMMIT_SCRIPTS`,
+    :setting:`POST_PUSH_SCRIPTS`,
+    :ref:`component`
+
 Pre commit processing of translations
--------------------------------------
++++++++++++++++++++++++++++++++++++++
 
 In many cases you might want to automatically do some changes to translation
 before it is committed to the repository. The pre commit script is exactly the