If a --gsmtap-host (-g) address is specified on the command line, trace
SIM ATRs and APDUs to the given IP. If --gsmtap-slot (-G) is provided,
limit tracing to the specified bank slot number. This feature may be
useful when diagnosing issues with the remote SIM framework.
Added new log category: DGSMTAP
Also, cleaned up alignment in bankd --help output and removed unused -o option.
Change-Id: I05b599858d8758633aa56c3f12f258c27cf42d08
James Tavares