@name route
@param address A `luci.ip.cidr` instance or a string containing
a valid IPv4 or IPv6 range as specified by `luci.ip.new()`.
+@param source A `luci.ip.cidr` instance or a string containing
+the preferred source address for route selection (optional).
@return <p>Table containing the fields described below.</p>
<table id="routetable">
<tr><th>Field</th><th>Description</th></tr>