Re #1069:
 - Added new approach of SRTP optional mode in pjsua-lib by duplicating SDP media line for secured and unsecured version of media transport.
 - Integrated this feature into pjsua app, it is activated via --use-srtp=3 param.



git-svn-id: https://svn.pjsip.org/repos/pjproject/trunk@3172 74dad513-b988-da41-8d7b-12977e46ad98
diff --git a/pjsip/src/pjsua-lib/pjsua_acc.c b/pjsip/src/pjsua-lib/pjsua_acc.c
index 6af6b3d..3ddcdd5 100644
--- a/pjsip/src/pjsua-lib/pjsua_acc.c
+++ b/pjsip/src/pjsua-lib/pjsua_acc.c
@@ -751,6 +751,7 @@
 #if defined(PJMEDIA_HAS_SRTP) && (PJMEDIA_HAS_SRTP != 0)
     acc->cfg.use_srtp = cfg->use_srtp;
     acc->cfg.srtp_secure_signaling = cfg->srtp_secure_signaling;
+    acc->cfg.srtp_optional_dup_offer = cfg->srtp_optional_dup_offer;    
 #endif
 
     /* Global outbound proxy */