* Restore #![feature(test)] and extern crate test; statements, which
were mistakenly removed as part of the Rust 2018 edition migration.

* Fix rendering benchmark's usage of RenderContext. 6 parameters were
provided when 5 were expected.

* Treat 304 (Not Modified) requests as valid.

* Add tests for 301-to-200 links, 301-to-404 links, and 500 links.
This helps to test redirections and the previously-added
response.status() checking for non-success status codes in check_url().

* Make names for HTTP mock paths unique, to avoid weird behavior. It
seems like mocks with the same path can potentially bleed between
tests, so you may end up with an unexpected response which causes the
test to sometimes pass and sometimes fail.

* Fix Clippy warnings about String::from(format!()).

Certain tests involving HTTP requests were sometimes hanging
indefinitely, so this uses Mockito for HTTP mocking. This seemingly
resolves the issue and makes these tests more reliable.

The existing can_fail_404_links test has been renamed to
can_fail_unresolved_links, to represent what actually occurs in the
test. The can_fail_404_links test now deals with a proper 404
response.

Just to be clear, the check_site test in the site component will
still create outgoing HTTP requests (due to the URLs used in the
test_site), so this commit only uses HTTP mocking where possible.

The can_fail_404_links() test doesn't encounter a 404 response in
actuality, since the google.comys domain doesn't resolve. When the
test is updated such that the response's status code is a 404, the
test fails because the check_url() function doesn't handle
non-success responses how the test's assertions expect. This commit
updates check_url() to handle non-success responses, treating them
much like errors.

async/await will be used in upcoming changes, so we need to bump the
minimum Rust version to 1.39.0 to use it.

* maybe_slugify() only does simple sanitation if config.slugify is false

* slugify is disabled by default, turn on for backwards-compatibility

* First docs changes for optional slugification

* Remove # from slugs but not &

* Add/fix tests for utf8 slugs

* Fix test sites for i18n slugs

* fix templates tests for i18n slugs

* Rename slugify setting to slugify_paths

* Default slugify_paths

* Update documentation for slugify_paths

* quasi_slugify removes ?, /, # and newlines

* Remove forbidden NTFS chars in quasi_slugify()

* Slugification forbidden chars can be configured

* Remove trailing dot/space in quasi_slugify

* Fix NTFS path sanitation

* Revert configurable slugification charset

* Remove \r for windows newlines and \t tabulations in quasi_slugify()

* Update docs for output paths

* Replace slugify with slugify_paths

* Fix test

* Default to not slugifying

* Move slugs utils to utils crate

* Use slugify_paths for anchors as well

This addresses the following Clippy warnings:

* clippy::option_and_then_some
* clippy::useless_format

* Add path to `TranslatedContent`

This makes it possible to retrieve the translated page through the `get_page` function.

* Use TranslatedContent::path field in test_site_i18n

Use it with the `get_page` function to get a reference to the page object.

Closes #866

Closes #366

* Compute canonical path before adjusting parent path

* Don't use adjusted `parent` to recalculate `canonical` in `find_language`

* Add regression tests

- Test for correct canonical field when calling `new_page`
- Test for correct canonical field after calling `find_language`

* Update installation.md

* Update cli-usage.md

* Update installation.md

* Update directory-structure.md

* Update configuration.md

* Update overview.md

* Update section.md

* Update page.md

* Update section.md

* Update configuration.md

* Update page.md

* Update section.md

* Update page.md

* Update shortcodes.md

* Update linking.md

* Update table-of-contents.md

* Update syntax-highlighting.md

* Update taxonomies.md

* Update search.md

* Update sass.md

* Update index.md

* Update multilingual.md

* Update overview.md

* Update pages-sections.md

* Update pagination.md

* Update taxonomies.md

* Update rss.md

* Update sitemap.md

* Update robots.md

* Update 404.md

* Update archive.md

* Update overview.md

* Update installing-and-using-themes.md

* Update creating-a-theme.md

* Update netlify.md

* Update github-pages.md

* Update gitlab-pages.md

* Update index.md

* Update page.md

* Update section.md

* Updates.

* fix(init):  handle already existing path

* chore: add tests

* feat(pagination): Add `total_pages` in paginator object

* feat(pagination): Added doc for `total_pages`

* feat(pagination): Added test for `total_pages`

"[…] `&` normally indicates the start of a character entity reference or
numeric character reference; writing it as `&` […] allows `&` to be
included in the content of an element or in the value of an attribute."

From: https://en.wikipedia.org/wiki/HTML#Character_and_entity_references

* cargo fmt & clippy

* Skip anchor checking for URL with prefix in config

* Let toc is visable through Page & Section variables in templates

* Removed the current toc variable from page & section

Links that start with a scheme (e.g., `tel:18008675309`) inadvertently
had a URL prefix prepended. Previously, only `mailto:` was handled, but
given the sheer number of [registered URI schemes][uri-schemes], a loose
pattern matcher is used to detect schemes instead.

External links, as identified by the renderer, are now limited to `http`
and `https` schemes.

Fixes #747 and fixes #816.

[uri-schemes]: https://www.iana.org/assignments/uri-schemes/uri-schemes.xhtml

Closes #813

Presently when you `^C` in `zola serve` it is painted with the same
color as the previous message. This PR always ensures to reset the color
in colorize, before writing the newline.

Hello !
I'm proposing my ZOLA blog to fill your examples list.

I'm very satisfied by ZOLA, thanks you for creating all this.

Pierre

Updated the copyright year in the docs template to reflect the new year.

- "/templates" section is gone upstream