TODO

   1 TODOS:
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   3
   4 * Add --socket option if no HOME found (sessiond)
   5 * Use realloc() in ask_sessiond() (liblttngctl)
   6 * perror() --> PERROR() (everywhere in the code)
   7 * Add a command to "lttng" to consume data when the tracer is in flightrecorder mode
   8 * Fix error handling for UST support when enabling events on all applications.
   9 * Support for UST remaining domains (PID, EXEC_NAME, FOLLOW_CHILDREN).