ply-2.2.0

Changed

• kprobe wildcards are now filtered through
  available_filter_functions, if available, making them much more
  reliable.

Added

• Self-test (ply -T) to automatically diagnose the most common
  configuration issues.
• sum() aggregation (Namhyung Kim).
• BEGIN and END probes that run at the beginning/end of a script
  (Namhyung Kim).
• interval provider to run a probe at a specified interval (Namhyung
  Kim).
• Access to dynamic tracepoint data, i.e. members marked with the
  __data_loc attribute.

Fixed

• A bunch of parsing errors from weird scripts. Found via fuzzing done
  by Juraj Vijtiuk.
• Static linking is now supported (Namhyung Kim)
• Data layout issues with some tracepoints.