correction of 7.5kHz handling during initial synchronization. Increase in dynamic range of SSS detection

Conflicts:
	openair1/SIMULATION/LTE_PHY/dummy_functions.c

integration of L1/L2 sidelink synchronization. USRP interfaces and threading for sidelink. Currently only HW support for off-network case.

Conflicts:
	cmake_targets/CMakeLists.txt
	cmake_targets/build_oai
	common/config/config_cmdline.c
	open-nfapi.oai.patch
	openair1/PHY/INIT/lte_init.c
	openair1/PHY/LTE_TRANSPORT/dci.c
	openair1/PHY/LTE_TRANSPORT/dci_tools.c
	openair1/PHY/LTE_TRANSPORT/drs_modulation.c
	openair1/SCHED/fapi_l1.c
	openair1/SCHED/phy_procedures_lte_eNb.c
	openair1/SCHED/phy_procedures_lte_ue.c
	openair1/SCHED/ru_procedures.c
	openair2/ENB_APP/enb_app.c
	openair2/ENB_APP/enb_config.c
	openair2/ENB_APP/enb_paramdef.h
	openair2/ENB_APP/flexran_agent_common.c
	openair2/LAYER2/MAC/config.c
	openair2/LAYER2/MAC/defs.h
	openair2/LAYER2/MAC/eNB_scheduler.c
	openair2/LAYER2/MAC/eNB_scheduler_RA.c
	openair2/LAYER2/MAC/eNB_scheduler_bch.c
	openair2/LAYER2/MAC/eNB_scheduler_dlsch.c
	openair2/LAYER2/MAC/eNB_scheduler_mch.c
	openair2/LAYER2/MAC/eNB_scheduler_primitives.c
	openair2/LAYER2/MAC/eNB_scheduler_ulsch.c
	openair2/LAYER2/MAC/flexran_agent_scheduler_dataplane.c
	openair2/LAYER2/MAC/flexran_agent_scheduler_dlsch_ue.c
	openair2/LAYER2/MAC/main.c
	openair2/LAYER2/MAC/pre_processor.c
	openair2/LAYER2/MAC/proto.h
	openair2/LAYER2/MAC/ra_procedures.c
	openair2/LAYER2/MAC/ue_procedures.c
	openair2/LAYER2/PDCP_v10.1.0/pdcp.c
	openair2/LAYER2/PDCP_v10.1.0/pdcp_fifo.c
	openair2/LAYER2/RLC/rlc_rrc.c
	openair2/PHY_INTERFACE/IF_Module.c
	openair2/RRC/LITE/L2_interface.c
	openair2/RRC/LITE/defs.h
	openair2/RRC/LITE/proto.h
	openair2/RRC/LITE/rrc_UE.c
	openair2/RRC/LITE/rrc_common.c
	openair2/RRC/LITE/rrc_eNB.c
	openair2/UTIL/LOG/log.c
	openair2/UTIL/LOG/log.h
	openair3/GTPV1-U/gtpv1u_eNB.c
	targets/ARCH/USRP/USERSPACE/LIB/usrp_lib.cpp
	targets/COMMON/create_tasks.c
	targets/PROJECTS/GENERIC-LTE-EPC/CONF/oaiL1.nfapi.usrpb210.conf
	targets/PROJECTS/GENERIC-LTE-EPC/CONF/rcc.band7.tm1.50PRB.nfapi.conf
	targets/RT/USER/lte-enb.c
	targets/RT/USER/lte-ru.c
	targets/RT/USER/lte-softmodem.c
	targets/RT/USER/lte-softmodem.h
	targets/RT/USER/lte-ue.c
	targets/SIMU/USER/channel_sim.c

The PHICH was not programmed for the last round (4) because it was
not programmed in rx_sdu but in schedule_ulsch_rnti, only in case
of a programmed retransmission (there is obviously no retransmission
programmed after the last round).

The case of Msg3 is not handled. To be done somehow.

The code is too complex. This commit may not be enough.

Summary of changes:
- bug fix in the FlexRAN API (correct a check)
- bug fix for sending the right RNTI in a FlexRAN message
- fixes small bug in ulsim which kills one RX antenna in channel simulation.
  Another simple but bad bug in ulsch_demodulation.c (bad access of avgU
  array). This probably resulted in a performance degradation for non-ideal
  channels, even for 1 antenna. The avgU was read in position 1 instead of
  0 for 1-antenna and in positions 1 and 2 instead of 0 and 1 for 2-antennas.
- work from Nokia:
    1) shared library loader, with integration for oai devices, encoder and telnet server
    2) telnet server (use build-oai --build-telnetsrv option and --telnetsrv softmodem option)
    3) UE/eNB in different executables (lte-uesoftmodem and lte-softmodem + noS1 variants)
    4) config module fixes and extensions
    5) very preliminary NB-IoT integration preparation, using shared lib loader ( use make NB-IoT to build, after building the eNB softmodem)
    6) Rename NB-IoT configuration sources from nbiot_ to NB-IoT_ to be consistent with other NB-IoT developments.
- various bugs fixed:
  - try to avoid "buffer full" problem when pushing DL traffic
  - add a stop_rf function in the RU
  - cleanup - remove unnecessary calls to get_cpu_freq_GHz
    (was disrupting realtime at startup, generating lots of UU and LL)
  - cleanup MAC PDU generation

Compilation with Rel10 is not functional anymore.
Compilation of unitary simulator is not functional anymore.