let's print an error in case of failure when trying to open it

it was 8 in the past
now it is 4
we should get the value from config, not hardcoded

Conflicts:
	openair2/LAYER2/MAC/eNB_scheduler_RA.c

This tracer takes the traces ENB_MAC_UE_DL_PDU_WITH_DATA
and ENB_MAC_UE_UL_PDU_WITH_DATA from a trace file
(as generated by the "record" tracer) and sends them
in UDP packets correctly formatted for wireshark to
dissect them.

One unresolved problem I face with my version of
wireshark (1.10.6) is that I don't get the frame number,
only subframe. See in the code to change the behavior
if you use a more recent version of wireshark.

You need to properly configure wireshark for it to work.
See $OPENAIR_DIR/openair2/UTIL/OPT/README.txt.

  - fix the run_enb_ue_virt_s1 script
  - change the Ki value back to the one used

fix gnutls download (closes #122)

Please merge this fix,

Regards,

Frédéric

See merge request !38

This reverts commit 3f20ce7b.

it was mistakenly pushed to develop

thanks to Supreeth Herle for reporting.

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Conflicts:
	cmake_targets/build_oai
	openair1/PHY/LTE_TRANSPORT/dci.c
	openair1/PHY/LTE_TRANSPORT/proto.h
	openair1/SCHED/phy_procedures_lte_eNb.c
	openair1/SCHED/phy_procedures_lte_ue.c
	openair2/LAYER2/MAC/eNB_scheduler_dlsch.c
	openair2/LAYER2/MAC/eNB_scheduler_primitives.c
	openair2/LAYER2/MAC/eNB_scheduler_ulsch.c
	targets/SIMU/USER/oaisim.c
	targets/SIMU/USER/oaisim_functions.c

use --fapi-tracer with build_oai to activate
(basically set FAPI_TRACER to True in CMakeLists.txt)

the file /tmp/fapi.c will be produced at runtime

then cd openair2/LAYER2/MAC and compile fapi_replay.c to replay it

this is forbidden, libscheduler.a is not happy