Add explanation about fuzzy rules configuration

rules/rules.yaml

@@ -1,3 +1,20 @@
+# This file comes from an adaptation of rules present in
+# https://github.com/webrecorder/wabac.js/blame/main/src/fuzzymatcher.js
+#
+# Syncing rules is done manually, based on expert knowledge, especially because in
+# warc2zim we are not really fuzzy matching (searching the best entry among existing
+# ones) but just rewriting to proper path.
+#
+# This file is in sync with content at commit 879018d5b96962df82340a9a57570bbc0fc67815
+# from June 9, 2024
+#
+# This file should be updated at every release of warc2zim
+#
+# Some rules are voluntarily missing because not been tested in warc2zim yet: Twitter,
+# Washington Post, WixStatic, Facebook
+#
+# Generic rules are also ommitted on purpose, we don't need them
+#
 fuzzyRules:
   - pattern: .*googlevideo.com/(videoplayback(?=\?)).*[?&](id=[^&]+).*
     replace: youtube.fuzzy.replayweb.page/\1?\2