b2b_logic: document adv_contact param for b2b_bridge_request

Complete 726fca1

(cherry picked from commit ce9fccc)

modules/b2b_logic/doc/b2b_logic_admin.xml

@@ -958,7 +958,7 @@ route[b2b_logic_request] {
 
 	<section id="func_b2b_bridge_request" xreflabel="b2b_bridge_request()">
 		<title>
-		<function moreinfo="none">b2b_bridge_request(b2bl_key,entity_no)</function>
+		<function moreinfo="none">b2b_bridge_request(b2bl_key,entity_no, [adv_contact])</function>
 		</title>
 		<para>
 			This function will bridge an initial INVITE with one of the
@@ -975,6 +975,10 @@ route[b2b_logic_request] {
 				<emphasis>entity_no (int)</emphasis> - an integer that
 				holds the entity of the entity/participant to bridge.
 			</para></listitem>
+			<listitem><para>
+				<emphasis>adv_contact (string, optional)</emphasis> - Contact header to
+				advertise in generated messages.
+			</para></listitem>
 		</itemizedlist>
 		<example>
 			<title><function>b2b_bridge_request</function> usage</title>