Signed-off-by: Raphael Defosseux <raphael.defosseux@eurecom.fr>

Signed-off-by: Raphael Defosseux <raphael.defosseux@eurecom.fr>

new interpretation of sdr_addrs string in RU config file: this is now directly passed to the uhd to specify a device. It may contain a device type (i.e., "type=x300") or an IP address (i.e., "addr=192.168.10.2")

If the IP address for X2AP is not good, the error message reported
was very unclear. Attempt to make it better.

This commit manually reverts the commits:
- 97c69dc4
- 3278aa49

The basic simulator was not functional anymore because
the UE did not send RRCConnectionSetupComplete due to
some problem in the PDCP layer, most probably.

This break was there and went away, for whatever reason...

The bug popped up when one UE was doing TCP UL iperf and a second UE
attempted to connect. A crash of the eNB happened because we changed
the wrong NFAPI structure in a TTI where both UEs are scheduled.

Something like that.

SCTP: one to many sockets implementation

Fix: RAN API: remove_ul_slice() frees ul sched_name pointer, when sched_name set, free it when resetting