nmxptool plugin used at INGV

seiscomp3_templates/nmxp/seedlink_plugin.tpl

+* template: $template
+plugin $seedlink.source.id cmd="$seedlink.plugin_dir/nmxptool -H $sources.nmxp.address -P $sources.nmxp.port -N IV -F $pkgroot/nmxptool_channelfile_$sources.nmxp.address\.$sources.nmxp.port\.txt -v 16 -k"
+             timeout = 600
+             start_retry = 30
+             shutdown_wait = 15