fi_info returns NODATA until implementation is done.
Merge branch 'master' into devel
Implemented RDM send/recv
Merge branch 'miao/devel' into devel
Solved merge conflicts

Conflicts:
	prov/sockets/src/sock.h
	prov/sockets/src/sock_dgram.c
	prov/sockets/src/sock_rdm.c
- Unified address formats
- Added address lookup functions
- Devel changes for RDM Send/Recv
- Devel changes for RDM progress
- Changes for source address lookup
- Changes for RDM
reverting changes in fi_endpoint
prov/sock_dgram: clean up initialization code; fix a bug in msg_recvfrom when calling from msg_recv.