add disable_hold var or disable-hold profile param

src/mod/endpoints/mod_sofia/sofia_glue.c

@@ -3392,7 +3392,7 @@ uint8_t sofia_glue_negotiate_sdp(switch_core_session_t *session, sdp_session_t *
 		}
 	}
 
-	if (sofia_test_pflag(tech_pvt->profile, PFLAG_DISABLE_HOLD) ||
+	if (sofia_test_flag(tech_pvt->profile, PFLAG_DISABLE_HOLD) ||
 		((val = switch_channel_get_variable(tech_pvt->channel, "sip_disable_hold")) && switch_true(val))) {
 		sendonly = 0;
 	}