Switch from using pjsip_strerror to pj_strerror.

pjsip_strerror is only aware of PJSIP-specific error
codes. pj_strerror() is aware of all PJProject error
codes and OS-specific error codes.

This specifically fixes an oft-seen error in transport
configuration code where EADDRINUSE would result in
"Unknown PJSIP error 120098" instead of a useful
message.
........

Merged revisions 400749 from http://svn.asterisk.org/svn/asterisk/branches/12


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@400750 65c4cc65-6c06-0410-ace0-fbb531ad65f3

res/res_pjsip.c

@@ -1437,7 +1437,7 @@ pjsip_dialog *ast_sip_create_dialog_uas(const struct ast_sip_endpoint *endpoint,
 	if (status != PJ_SUCCESS) {
 		char err[PJ_ERR_MSG_SIZE];
 
-		pjsip_strerror(status, err, sizeof(err));
+		pj_strerror(status, err, sizeof(err));
 		ast_log(LOG_ERROR, "Could not create dialog with endpoint %s. %s\n",
 				ast_sorcery_object_get_id(endpoint), err);
 		return NULL;

res/res_pjsip/config_transport.c

@@ -184,7 +184,7 @@ static int transport_apply(const struct ast_sorcery *sorcery, void *obj)
 	if (res != PJ_SUCCESS) {
 		char msg[PJ_ERR_MSG_SIZE];
 
-		pjsip_strerror(res, msg, sizeof(msg));
+		pj_strerror(res, msg, sizeof(msg));
 		ast_log(LOG_ERROR, "Transport '%s' could not be started: %s\n", ast_sorcery_object_get_id(obj), msg);
 		return -1;
 	}