Happy Birthday Brother

Bug Fixes

• parse floating point numbers according to C locale in rrdtool create
  arguments, regardless of the systems locale setting.
• include missing rrd_rados.h into distribution archive
• make rrdtool work on ARM again
• make rrdtool test suit pass on 32bit OSs
• fix --grid-dash option regression in graph
• fix systemd support
• fix link dependency for libpng since we are using functions directly
• fix python module name
• fix rrdtool tune to accept U in minimum and maximum options
• fi
• rrd_parsetime now uses a mutex lock to become thread safe
• rrd_xport is now thread safe
• stop using MAX_PATH and make everything dynamic and make rrdtool work on
  Gnu HURD ... thanks nirgal!

Features

• new RPN operators: STEPWIDTH, NEWDAY, NEWWEEK, NEWMONTH and NEWWEEK
  together they allow to draw graphs where a rate is converted back to
  absolute numbers and accumulated over a period.