[sr-dev] [kamailio/kamailio] extensions to lost and http_client modules (#2675)

[sergey-safarov]

@sergey-safarov commented on this pull request.



> +			    </itemizedlist>
+			<para>
+			The return value is 200 on success, 400 if an internal error occured, or 500 if an
+            error code is returned in the HELD response.
+	    	</para>
+			<para>
+			This function can be used from REQUEST_ROUTE,
+			ONREPLY_ROUTE, FAILURE_ROUTE, and BRANCH_ROUTE.
+			</para>
+			<example>
+				<title><function>lost_held_dereference()</function> usage</title>
+				<programlisting format="linespecific">
+...
+# HELD location dereference
+if ($hdr(Geolocation)=~"^<http.*$") {
+    $var(url) = $(hdr(Geolocation){s.select,0,;});

I can suggest use
```
$var(url) = @hf_value.geolocation[1].uri;
```

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