* httpcaddyfile: Change the parse rules when empty file or dotfile with a glob.
* Fixes#5295
* Empty file should just log a warning, and result in no tokens.
* The last segment of the path is '*', it should skip any dotfiles.
* The last segment of the path is '.*', it should read all dotfiles in a dir.
* httpcaddyfile: Regard empty files as import files which include only white space.
* caddyfile: reject recursive self-imports
* caddyfile: detect and reject cyclic imports of snippets and files
* caddyfile: do not be stickler about connected nodes not being connected already
* caddyfile: include missing test artifacts of cyclic imports
* address review comments
Along with several other changes, such as renaming caddyhttp.ServerRoute
to caddyhttp.Route, exporting some types that were not exported before,
and tweaking the caddytls TLS values to be more consistent.
Notably, we also now disable automatic cert management for names which
already have a cert (manually) loaded into the cache. These names no
longer need to be specified in the "skip_certificates" field of the
automatic HTTPS config, because they will be skipped automatically.
Francis Lavoie