<p>The most important of these new features are:
<itemize>
<item>Support libecap v1.0
+ <item>Authentication helper query extensions
</itemize>
Most user-facing changes are reflected in squid.conf (see below).
due to API changes.
+<sect1>Authentication helper query extensions
+<p>Details at <url url="http://www.squid-cache.org/Doc/config/auth_param/">.
+
+<p>The new <em>key_extras</em> parameter allows sending of additional
+ details to the authentication helper beyond the minimum required for
+ the HTTP authentication. This is primarily intended to allow switching
+ of authentication databases based on criteria such as client IP subnet,
+ Squid receiving port, or in reverse-proxy the requested domain name.
+
+<p>In theory any <em>logformat</em> code may be used, however only the
+ codes which have available details at the time of authentication
+ will send any meaningful detail.
+
+
<sect>Changes to squid.conf since Squid-3.4
<p>
There have been changes to Squid's configuration file since Squid-3.4.