This file is indexed.

/usr/share/kde4/services/ed2k.protocol is in plasma-widget-amule 2.4.0~git20151120.0023527bc2-1ubuntu1.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

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[Protocol]
exec=plasmamule-engine-feeder %U
protocol=ed2k
input=none
output=none
helper=true