Fix for -Werror=unused-result
bugfix
more log on exit status of rrdtool cmd
Merge branch 'patch/protocols_solaris' into release/5.4.0
Merge branch 'plugin/jsonrpc' into release/5.4.0
New release 5.4.0-20140219
Merge branch 'release/5.4.0' of https://github.com/perfwatcher/collectd-pw into packaging