res_pjsip_outbound_publish.c: Add more verbose documentation for outbound_proxy usage

configs/samples/pjsip.conf.sample

@@ -1609,8 +1609,8 @@
                            ; setting between inbound and outbound authentication
                            ; uses. See the auth realm description for details.
 
-;outbound_proxy=           ; SIP URI of the outbound proxy used to send
-                           ; publishes
+;outbound_proxy=           ; SIP URI of the outbound proxy used to send publishes.
+                           ; Consider adding \;lr to keep user@domain in the request URI.
 
 ;server_uri=               ; SIP URI of the server and entity to publish to.
                            ; This is the URI at which to find the entity and

res/res_pjsip/pjsip_config.xml

@@ -764,6 +764,10 @@
 						<version>12.0.0</version>
 					</since>
 					<synopsis>Full SIP URI of the outbound proxy used to send requests</synopsis>
+					<description><para>
+						Proxy through which to send requests, a full SIP URI must be provided (default: "").
+						Consider adding \;lr for loose routing (to keep user@domain in the request URI).
+					</para></description>
 				</configOption>
 				<configOption name="rewrite_contact">
 					<since>

res/res_pjsip_outbound_publish.c

@@ -85,6 +85,10 @@
 						<version>13.0.0</version>
 					</since>
 					<synopsis>Full SIP URI of the outbound proxy used to send publishes</synopsis>
+					<description><para>
+						Proxy through which to send requests, a full SIP URI must be provided (default: "").
+						Consider adding \;lr for loose routing (to keep user@domain in the request URI).
+					</para></description>
 				</configOption>
 				<configOption name="server_uri">
 					<since>