Note: some modifications have been done to the UE too, but for syntactic
reasons. The UE may fail to work, not tested.

For the UE, we have the problem of handling properly SecurityModeCommand.
We don't verify its integrity. This is a bit complicated to handle properly
and may require some API changes in the PDCP layer. So, as of today, the
integrity of this message is not verified.

Also, NSA mode has been touched, but it should not be a problem. But not
tested, so not sure.

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

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

Configure PDCP entity for UE DRB with no integrity and ciphering to comply with configuration at gNB

-To be revisited if we want to enable integrity and ciphering for DRBs

dirty fixes that fix the UL malformed packets (detected in wireshark), and also internally memory corrpution

add DLinformationTransfer in nrUE, process SRB!=1 in UE (instead of discard), change struct member pdusession into pduSession to increase code readability (another struct contains also pdusession in lower case)