This file is indexed.

/etc/shellinabox/options-enabled/README is in shellinabox 2.14-1.

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

The actual contents of the file can be viewed below.

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This directory contains links to "/etc/shellinabox/options-available". See
that directory for more details on how to enable or disable options that
show up in the right-click context menu.