Modified bin/xwrap so that it can execute applications from directories other than the current dir
SID data plane can detect unsuccessfully rescoped DAG now
Ability to correct the unsuccessful rescope by rescope it again (failover on the fly?)
Added options to disable broadcasting SIDs in the config file. Added httpSID for application level demo
getaddrinfo now generates DAGs for client(connect) differently from that for server(bind). If the client only gives an SID but no AD/HID, A DAG like src->SID is generated if AI_PASSIVE is not given in parameter:hints.