Trim space around CDATA elements before extracting the CharData.

This problem was discovered when reading https://www.sethvargo.com/feed.xml.
Title and Summary fields have newlines and space between the <title>
element and the CDATA element. e.g.

  <title>
    <![CDATA[Entry title here]]>
  </title>

This meant the title of the feed was coming into MiniFlux as,
  <![CDATA[Entry title here]]>

Bumps [github.com/tdewolff/minify/v2](https://github.com/tdewolff/minify) from 2.9.27 to 2.9.28.
- [Release notes](https://github.com/tdewolff/minify/releases)
- [Commits](https://github.com/tdewolff/minify/compare/v2.9.27...v2.9.28

)

---
updated-dependencies:
- dependency-name: github.com/tdewolff/minify/v2
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

c.f. https://www.freedesktop.org/software/systemd/man/systemd.directives.html#Documentation=

Bumps [github.com/tdewolff/minify/v2](https://github.com/tdewolff/minify) from 2.9.26 to 2.9.27.
- [Release notes](https://github.com/tdewolff/minify/releases)
- [Commits](https://github.com/tdewolff/minify/compare/v2.9.26...v2.9.27

)

---
updated-dependencies:
- dependency-name: github.com/tdewolff/minify/v2
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

Bumps [github.com/tdewolff/minify/v2](https://github.com/tdewolff/minify) from 2.9.24 to 2.9.26.
- [Release notes](https://github.com/tdewolff/minify/releases)
- [Commits](https://github.com/tdewolff/minify/compare/v2.9.24...v2.9.26

)

---
updated-dependencies:
- dependency-name: github.com/tdewolff/minify/v2
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

Some articles (especially the recent year-in-review ones) include a Youtube
video. The server-side rendered articles do not include the Youtube iframe,
but they do have a script that looks like

    <script type="text/javascript" data-reactid="6">
      window.__APOLLO_STATE__ = {
        ...
          youtube_id: "9uASADiYe_8",

We add a reformatting function that tries to detect obvious JavaScript code
that has a field or variable called youtube_id that has an 11-character
double-quoted value, and adds the referenced Youtube videos in the beginning of
the article. This is slightly more general than needed for Quanta, in the hope
that it could be useful for similar sites.

This is a somewhat complex React site so the rules could be a little fragile.
Text content seems to be always inside .outer--content, and most h6 elements
are fluff like "read later" or pointers to other articles. However, h6.byline
and h6.post__title__kicker are relevant to the current article.

Figure captions are sometimes inside both figure and div.outer--content
elements, sometimes only inside figure, so take both and remove the
intersection.

The figure elements sometimes contain multiple copies of images or
videos, and we just take them all. Math articles seem to use Mathjax,
which we don't add.

Why:

A user might want to unshare a specific entry. Navigating to the shared
entries page requires a mental context switch, whereas having the
ability right in the entry page makes it easier.

What:

Add an extra <li> element to display the unshare icon and link in the
entry view as well as the item_meta template. The latter is shared for
multiple pages listing entries, e.g. bookmarks, feed entries, search,
history etc.

The functionality already exists for the shared entries page, we are
just expose it in a couple more places

Signed-off-by: Alexandros Kosiaris <akosiaris@gmail.com>

Co-authored-by: Sebastian Kempken <sebastian@kempken.io>
Co-authored-by: Gergan Penkov <gergan@gmail.com>
Co-authored-by: Dave Marquard <dave@marquard.org>
Co-authored-by: Moritz Fago <4459068+MoritzFago@users.noreply.github.com>

- SVG images could contains Javascript. This CSP blocks inline script.
- Feed icons are served using <img> tag and Javascript is not interpreted.

See https://developer.mozilla.org/en-US/docs/Web/SVG/SVG_as_an_Image#restrictions

Feed: https://ikiwiki.iki.fi/feed.php?linkto=current&ns=uutiset%3Ablog&num=5

Example page: https://ikiwiki.iki.fi/uutiset/blog/20210923100421viiveita

(To clarify, I'm not a representative of iki.fi although I have an email address in the domain. This is a nonprofit association that offers email forwarding addresses, and the rss feed in question contains news for their members.)

`SystemCallFilter=@system-service` is not supported on older systemd versions and causes crashes on them.

Fixes #1297.

Bumps [github.com/tdewolff/minify/v2](https://github.com/tdewolff/minify) from 2.9.22 to 2.9.24.
- [Release notes](https://github.com/tdewolff/minify/releases)
- [Commits](https://github.com/tdewolff/minify/compare/v2.9.22...v2.9.24

)

---
updated-dependencies:
- dependency-name: github.com/tdewolff/minify/v2
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

Comics site, uses alt image text similarly to xkcd.com.

Bumps [github.com/lib/pq](https://github.com/lib/pq) from 1.10.3 to 1.10.4.
- [Release notes](https://github.com/lib/pq/releases)
- [Commits](https://github.com/lib/pq/compare/v1.10.3...v1.10.4

)

---
updated-dependencies:
- dependency-name: github.com/lib/pq
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

Bumps [github.com/PuerkitoBio/goquery](https://github.com/PuerkitoBio/goquery) from 1.7.1 to 1.8.0.
- [Release notes](https://github.com/PuerkitoBio/goquery/releases)
- [Commits](https://github.com/PuerkitoBio/goquery/compare/v1.7.1...v1.8.0

)

---
updated-dependencies:
- dependency-name: github.com/PuerkitoBio/goquery
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>