Lidarr/UI/Settings/Misc/MiscTemplate.html

<fieldset>
    <legend>Misc</legend>
    <div class="control-group">
        <label class="control-label">Nzb Restrictions</label>

        <div class="controls">
            <textarea rows="3" name="nzbRestrictions" class="nzb-restrictions"></textarea>
            <span class="help-inline">
                <i class="icon-question-sign" title="Blacklist NZBs based on these words (case-insensitive)"/>
            </span>
            <span class="text-area-help">Newline-delimited set of rules</span>
        </div>
    </div>
</fieldset>