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.