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doc: add escaping special characters note #328

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5 changes: 5 additions & 0 deletions doc/update.rst
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Expand Up @@ -278,6 +278,11 @@ Example converting all drop rules with noalert back to alert::

re:. "^drop(.*)noalert(.*)" "alert\\1noalert\\2"

.. note:: ``suricata-update`` uses the python regular expression
engine. It is necessary to escape special characters
(e.g. . ``$ ^ * + ?``) with a ``\`` if they are desired
to be interpreted literally in the configuration files.

Order of application of configuration files
===========================================
1. disable.conf
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