* Match <!-- more --> without spaces

* Add tests for new <!-- more --> handling, with a note on pulldown-cmark bug

This fixes a bug introduced in getzola#2258

The issue arose when `output_path` was relative. The request being
served would be canonicalized and this would be a string. So, for
example, if you were serving content from `public` the code
[right after](https://github.com/getzola/zola/blob/38199c125501e9ff0e700e96adaca72cc3f25d2b/src/cmd/serve.rs#L144-L147)
the canonicalization checking if
`root.starts_with(original_root)` would always return `false` since
an absolute path, `/some/path/to/content` would never start with a
string like `public`.

…27.0.0.1 (getzola#2395)

* Parse interface as IpAddr, allow IPv6.

* Default base_url to socket address, instead of 127.0.0.1

* Remove ensure_directory_exists since it's identical to create_directory, and misleading

* Don't create directories unless needed; rely on create_dir_all instead of manually iterating over components

* Allow ignoring files when link checking

* cargo fmt

* Fix tests

* Remove mystery duplicate function..?

* Add in some mysterious missing code..?

* Simple tests for link checker file globs in config

* cargo fmt

* Remove comment

* convert expect to error propagation

* Address comments

* cargo fmt

* adding optional `lang` arugment to `get_section` global function

* Add handling of default language passed in `lang` argument of `get_section`

* Remove clones for path.  Change "?" to an explicit check for error

* lint changes

* Clean up error handling for add_lang_to_path call

* fix format

* Add optional parameter "lang" to get_page template function.  Add check for language available in config.

* Modify helper function name from calculate_path to get_path_with_lang.  Modify documentation for get_section and get_page to include equivalent calls without using lang argument to demostrate how lang argument effects pathing.

getzola#2432)

The pulldown_cmark escaping functionality is now shipped in a separate
pulldown_cmark_escape crate
(https://crates.io/crates/pulldown-cmark-escape), starting with v0.10.0.

The markdown.rs module has to be adapted to a few API changes in
pulldown_cmark, and we have to introduce explicit handling of <img> alt
text to ensure it continues to be properly escaped.

There are also a few other behavior changes that are caught by the
tests, but these actually seem to be desired, so I've updated the insta
snapshot files for those tests to incorporate those changes.
Specifically, one footnote-parsing case seems to be handled better now,
and pulldown-cmark's `push_html` now doesn't escape quotes in text nodes
anymore (see pulldown-cmark/pulldown-cmark#836).

…getzola#2311)

* Fix --base-url improper path and protocol handling.

* Fix formatting.

Fixes passing section.transparency for
getzola#1840

* Fix resizing for images with EXIF orientation

* Added test for asymmetric resize for exif images

---------

Co-authored-by: Tanishq <[email protected]>

* Fix link check report inconsistency

* Fix formatting issue

---------

Co-authored-by: Tanishq <[email protected]>

* Restore trailing slash behaviour in serve command.

* Restore guard in case where base_url is just a slash.

* Implemented bottom footnotes with backreferences

Fixes getzola#1285

* Added bottom_footnotes option to configuration.md

* Renamed fix_github_style_footnotes()

* Added tests for convert_footnotes_to_github_style()

* Changed test to plain html instead of Vec<Event>

* Added integration test for footnotes

* Applied suggested changes

As discussed in getzola#2421.