Noissue - Removed documentation for deprecated "! Checksum" special comment

pages/filters.html

 title=Writing Adblock Plus filters
 
 
 <p>{{s1 Current Adblock Plus versions allow you to "tweak" your filters in many different ways. This document explains the choices that you have and how they can be used.}}</p>
 
   <p>{{s2 <em>Disclaimer</em>: All filter examples given here are really only examples and are not meant to be used.}}</p>
 
   <h2 id="introduction">{{s3 Introduction to Adblock Plus filters}}</h2>
 
   <p>{{s4 The options described in this section should be enough for users who have to create a filter occasionally.}}</p>
@@ skipping 61 matching lines @@
     </p>
     <p>
       {{s28 This comment sets the update interval for the filter list, the value can be given in days (e.g. <code><fix>5 days</fix></code>) or hours
       (e.g. <code><fix>8 hours</fix></code>).}} {{s29 Any value between 1 hour and 14 days is possible.}} {{s30 Note that the update
       will not necessarily happen after this time interval.}} {{s31 The actual update time is slightly randomized and depends on
       some additional factors to reduce server load.}}
     </p>
   </li>
   <li>
     <p>
-      <code>! Checksum: OaopkIiiAl77sSHk/VAWDA</code>
-    </p>
-    <p>
-      {{s32 This comment makes sure that accidental corruption of the data won't result
-      in broken filters.}} {{s33 For example, some firewall software might modify the filter <code>*/adnetwork/*</code> on download
-      in an attempt to protect the user against ads.}} {{s34 It will remove part of the filter so that Adblock Plus will only see
-      the filter}} <code>**</code>{{s35 .}} {{s36 A checksum comment in the filter list protects against this scenario, any modifications
-      will have the result that the checksum no longer matches and Adblock Plus will ignore the data.}}
-    </p>
-    <p>
-      {{s37 To calculate the checksum the following steps need to be performed:}}
-    </p>
-    <ul>
-      <li>{{s38 Remove the existing checksum comment if any.}}</li>
-      <li>{{s39 Encode filter list text using UTF-8 encoding.}}</li>
-      <li>{{s40 Convert all line breaks to Unix style (replace <code><fix>\r</fix></code> by <code><fix>\n</fix></code> if present).}}</li>
-      <li>{{s41 Remove empty lines (replace sequences of the <code><fix>\n</fix></code> character by a single <code><fix>\n</fix></code> character).}}</li>
-      <li>{{s42 Calculate the base64-encoded MD5 checksum of the text, remove trailing}} <code>=</code> {{s43 characters if any.}}</li>
-    </ul>
-    <p>
-      {{s44 You can also have a look at the Python-based reference implementations to
-      <a href="https://hg.adblockplus.org/adblockplus/file/tip/validateChecksum.py">validate a checksum</a> and to
-      <a href="https://hg.adblockplus.org/adblockplus/file/tip/addChecksum.py">add a checksum to a file</a>.}}
-    </p>
-  </li>
-  <li>
-    <p>
       <code>! Redirect: http://example.com/list.txt</code>
     </p>
     <p>
       {{s45 This comment indicates that the filter list has moved to a new download address.}} {{s46 Adblock Plus will ignore any file
       contents beyond that comment and immediately try downloading from the new address.}} {{s47 In case of success the address
       of the filter list will be updated in the settings.}} {{s48 This comment is ignored if the new address is the same as the
       current address, meaning that it can be used to enforce the "canonical" address of the filter list.}}
     </p>
   </li>
   <li>
@@ skipping 186 matching lines @@
   {{s110 The data used for creating the signature is a concatenated list of request variables (namely URI, host and user agent) separated by the <code><fix>NUL</fix></code> character "\0". For example:}}
 </p>
 
 <pre>
   /index.html?q=foo\0www.example.com\0Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:30.0) Gecko/20100101 Firefox/30.0
 </pre>
 
 <p>
   {{s111 Finally, generate the signature for this string by using the signature algorithm SEC_OID_ISO_SHA_WITH_RSA_SIGNATURE (default when using OpenSSL).}}
 </p>