www/caddy: v1.5.5

[Monviech]

Important notices Before you add a new report, we ask you kindly to acknowledge the following:

• [x] I have read the contributing guide lines at https://github.com/opnsense/plugins/blob/master/CONTRIBUTING.md
• [x] I have searched the existing issues, open and closed, and I'm convinced that mine is new.
• [x] When the request is meant for an existing plugin, I've added its name to the title.

Tracker for next version:

• [x] https://github.com/opnsense/plugins/pull/3938
• [x] https://github.com/opnsense/plugins/pull/3934
• [x] https://github.com/opnsense/plugins/pull/3937
• [x] https://github.com/opnsense/plugins/pull/3941
• [x] https://github.com/opnsense/plugins/pull/3944
• [x] https://github.com/opnsense/plugins/pull/3960
• [x] https://github.com/opnsense/plugins/pull/3957
• [x] https://github.com/opnsense/plugins/pull/3956
• [x] https://github.com/opnsense/plugins/pull/3948

Docs:

• [x] https://github.com/opnsense/docs/pull/556

[Monviech]

@Fichtner This version is done, there won't be any more changes or additions.

[fichtner]

@Monviech if this is all feel free to close (even if small updates are still coming in later)

[Monviech]

@fichtner Sure, thank you for the review and the merge. :)

[Monviech]

Everything done here.