The binary compiled with PAR::Packer for Pandora FMS doesn't work well
with JSON:XS, probably because JSON::Backend::XS is defined in the __DATA__
section of JSON.pm and that doesn't work well with PAR::Filter. If this
becomes a bottleneck, a workaround would be possible (e.g., redefining
JSON::Backend::XS in omnishell_client.pl).
When /usr/lib/perl5 is added to the front of the module search path it
takes precedence over libraries distributed with binary versions of
Pandora FMS. This can be fixed by pushing it to the back instead.