Provide an example for escaping "\\"

[tfpauly]

From the list:

At the end of Section 2.1 in https://www.ietf.org/archive/id/draft-ietf-httpbis-alias-proxy-status-05.html, there is this:

It is also possible for a DNS name to include a period character (".") within a label, instead of as a label separator. In this case, the period character MUST be first escaped as ".". Since the "" character itself will be percent-encoded, the name "dot.label.example.com" would be encoded within a next-hop-aliases parameter as follows:

Proxy-Status: proxy.example.net; next-hop="2001:db8::1";
next-hop-aliases="dot%5C.label.example.com,service1.example.com"
Upon parsing this name, "dot%5C.label" MUST be treated as a single label.

Similarly the "" character in a label MUST be escaped as "\". Other uses of "" MUST NOT appear in the label after percent-decoding.

Can that last line be expounded on and clarified? Will a "" character in a label be 'eventually' encoded as "\" or "%5C%5C" or some combination of them?

[tfpauly]

I think we can add an example for this