www/caddy: Changes for version 1.5.3 and 1.5.4 (opnsense#548)

* Update caddy.rst - Some terminology changes for the new os-caddy version.

* Update caddy.rst - Small Typo fixed.

* Update caddy.rst - DNS01 is not needed for Dynamic DNS to work

* Update caddy.rst - Another small typo.

* Update caddy.rst

Add HTTP-01 challenge redirection option

* Update caddy.rst

- Added Tutorial section for the HTTP-01 challenge redirection
- A few more changes to get the docs in line with the new os-caddy-1.5.3 update

* Update caddy.rst - Add HTTP Response Code and Message

* Update caddy.rst - Add Header Manipulation

* Update caddy.rst - Added short tutorial how to use the most common header manipulation.

* Update caddy.rst - Improve header manipulation tutorial with the most common usecase, reverse proxying to an upstream webserver with vhosts.

* Update caddy.rst - Format fix

* Update caddy.rst - Add new fields for forward_auth support

* Update caddy.rst - Add configuration example for Authelia

* Update caddy.rst - Reformat doc

* Update caddy.rst

* Update caddy.rst - Again a few typos

* Revert all changes regarding forward_auth in caddy.rst

Since implementing this feature properly would take a redesign how the current handle/reverse_proxy structure works, it is unfeasible for now.

I am unsure the usecase is really there either. With basic_auth implemented, it's far easier to restrict access in a less convoluted way.

Combining basic_auth with http logs and crowdsec, makes bruteforcing also impossible, IP addresses are banned quite swiftly.

* Update source/manual/how-tos/caddy.rst - Typo

Co-authored-by: Dany Marcoux <[email protected]>

* Update source/manual/how-tos/caddy.rst - Typo

Co-authored-by: Dany Marcoux <[email protected]>

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Co-authored-by: Dany Marcoux <[email protected]>

Author: Monviech