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<p>I've noticed that the version of ngx_http_substitutions_filter
does not support the third argument to sub_filter. This causes an
error when trying to add for example "ri" as the third argument in
order to enable regex search:</p>
<pre>nginx: [emerg] invalid number of arguments in "sub_filter" directive
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It seems that the version packaged for Debian uses an old version of
this module that does not support regex substitutions. Are there
plans to use the newer version of the module?<br>
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