improve forkcallcontext so that in case of no-global-decline, 603 is store and treated as urgent reply.
improve forkcallcontext so that in case of no-global-decline, 603 is store and treated as urgent reply.

biddyweb/flexisip,biddyweb/flexisip,gale320/flexisip,BelledonneCommunications/flexisip,biddyweb/flexisip,BelledonneCommunications/flexisip,gale320/flexisip,biddyweb/flexisip,gale320/flexisip,BelledonneCommunications/flexisip,BelledonneCommunications/flexisip,gale320/flexisip