Version 0.18.4: Fixed long BSR CE and added extended power headroom CE support, added PDCP PDU with short SN support, and added header extnesion handling to RLC AMD to LTE library, added UmTRX support to LTE_fdd_dl_scan, fixed the start/stop/start issues by closing the TUN device on stop, fixed the RTS issues, added a mutex to the message queue circular buffer, fixed uninitialized variables in the configuration database, added header extension/multiple data support for RLC AMD, added detach handling, and added a common routine for formatting time to LTE_fdd_enodeb