Fix IPv6 addr with square brackets

[moonlightwatch]

What does this PR do?

Fix the function parseHost got different result from the host [ipv6Address] and the host [ipv6Address]:8000

Motivation

I have set the entryPoint on the port 80. And a router rule set as Host(ipv6address).
Send a request by curl : curl http://[ipv6address]/，I found the RequestDecorator parse the host to [ipv6address].
I try to set the port to 8080, and do curl http://[ipv6address]:8080/. The RequestDecorator parse the host to ipv6address.

More

• updated tests
• updated documentation

[ldez]

hello, can you prefer rebase over merge when you want to update your PR?

FYI, the PRs are automatically squashed and rebased when we merge a PR, you just have to rebase if your PR has conflicts.

[ldez]

You have missed something, I will clean your PR.

[ldez]

By default, you don't need to rebase or update your PR.
If we ask you some changes, you just have to create a new commit.
When the review will be done, our bot will rebase and squash your PR before the merge.

[moonlightwatch]

Thank you. I will do better next time.

[rtribotte]

Thanks 👍

[ldez]

LGTM