DevUI CORS - hostname dns reverse lookup use-case

[rsvoboda]

Description

DevUI CORS - enable hostname dns reverse lookup use-case, relates to #29342 (comment)

Current hostname (rsvoboda-mac in my case) use-case behaviour:
Changing value using http://rsvoboda-mac:8080/api/q/dev/io.quarkus.quarkus-vertx-http/config triggers 2022-11-23 09:45:31,871 ERROR [io.qua.ver.htt.run.dev.DevConsoleCORSFilter] (vert.x-eventloop-thread-0) Only localhost origin is allowed, but Origin header value is: http://rsvoboda-mac:8080

traceroute rsvoboda-mac                                                                                                                                               
traceroute to localhost (127.0.0.1), 64 hops max, 52 byte packets
 1  localhost (127.0.0.1)  0.611 ms  0.050 ms  0.040 ms

Implementation ideas

We have DevUI specific CORS config group. We can add a property there, allow-dns-reverse-lookup, which, if set to true will allow us check if the current DNS name resolves to localhost.

This is not super urgent, maybe we can keep the issue around and see if people vote for this or not.

CC @sberyozkin, @cescoffier

[cescoffier]

It needs to be explicit, but rather than that, great idea!