res_pjsip_caller_id: Don't overwrite user portion of the From header when fromuser is set.

The fromuser option is used to explicitly set the user within the From header. The
res_pjsip_caller_id module did not take this setting into account when determining
if the From header could be modified or not.

(closes issue ASTERISK-22866)
Reported by: Anthony Messina
........

Merged revisions 402891 from http://svn.asterisk.org/svn/asterisk/branches/12


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@402892 65c4cc65-6c06-0410-ace0-fbb531ad65f3

res/res_pjsip_caller_id.c

@@ -648,6 +648,7 @@ static void caller_id_outgoing_request(struct ast_sip_session *session, pjsip_tx
 
 	connected_id = ast_channel_connected_effective_id(session->channel);
 	if (session->inv_session->state < PJSIP_INV_STATE_CONFIRMED &&
+			ast_strlen_zero(session->endpoint->fromuser) &&
 			(session->endpoint->id.trust_outbound ||
 			((connected_id.name.presentation & AST_PRES_RESTRICTION) == AST_PRES_ALLOWED &&
 			(connected_id.number.presentation & AST_PRES_RESTRICTION) == AST_PRES_ALLOWED))) {