Retry when request fail; Updated default list of search engines

Closes e/backlog#3896

See merge request e/cloud/my-spot!70

onesearch engine

Closes e/backlog#3676

See merge request e/cloud/my-spot!71

fix git stash and filtron restart

Closes #69

See merge request e/cloud/my-spot!72

Fix broken layout

Closes e/backlog#1542 and #65

See merge request e/cloud/my-spot!69

Sync upstream

See merge request e/cloud/my-spot!68

Closes #3014

Pick Qwant changes

Has been reported in [1], error message::

    Error
        Error: searx.exceptions.SearxEngineAPIException
        Percentage: 0
        Parameters: ('API error::locale must be a string,locale must be one of
        the following values: en_gb, en_ie, en_us, en_ca, en_in, en_my, en_au,
        en_nz, cy_gb, gd_gb, de_de, de_ch, de_at, fr_fr, br_fr, fr_be, fr_ch,
        fr_ca, fr_ad, fc_ca, ec_ca, co_fr, es_es, es_ar, es_cl, es_co, es_mx,
        es_pe, es_ad, ca_es, ca_ad, ca_fr, eu_es, eu_fr, it_it, it_ch, pt_br,
        pt_pt, pt_ad, nl_be, nl_nl, pl_pl, zh_hk, zh_cn, fi_fi, bg_bg, et_ee,
        hu_hu, da_dk, nb_no, sv_se, ko_kr, th_th, cs_cz, ro_ro, el_gr',)
        File name: searx/engines/qwant.py:114
        Function: response
        Code: raise SearxEngineAPIException('API error::' + msg)

[1] https://github.com/searxng/searxng/issues/222

Signed-off-by: Markus Heiser <markus.heiser@darmarit.de>

Has been reported in [1], error messages::

  Error
       Error: ValueError
       Percentage: 0
       Parameters: ()
       File name: searx/engines/qwant.py:159
       Function: response
       Code: pub_date = datetime.fromtimestamp(item['date'], None)

    Error
        Error: TypeError
        Percentage: 0
        Parameters: ('an integer is required (got type NoneType)',)
        File name: searx/engines/qwant.py:196
        Function: response
       Code: pub_date = datetime.fromtimestamp(item['date'])

Fix timedelta from seconds to milliseconds [1], error message::

    Error
        Error: TypeError
        Percentage: 0
        Parameters: ('unsupported type for timedelta seconds component: NoneType',)
        File name: searx/engines/qwant.py:195
        Function: response
        Code: length = timedelta(seconds=item['duration'])

[1] https://github.com/searxng/searxng/issues/222

Signed-off-by: Markus Heiser <markus.heiser@darmarit.de>

minor modification of commit 628b5703f3aeeed117772696f83efb344d6f337e
(no functionnal change)

Signed-off-by: Markus Heiser <markus.heiser@darmarit.de>

The implementation uses the Qwant API (https://api.qwant.com/v3). The API is
undocumented but can be reverse engineered by reading the network log of
https://www.qwant.com/

 queries.

This implementation is used by different qwant engines in the settings.yml::

  - name: qwant
    categories: general
    ...
  - name: qwant news
    categories: news
    ...
  - name: qwant images
    categories: images
    ...
  - name: qwant videos
    categories: videos
    ...
Signed-off-by: Markus Heiser <markus.heiser@darmarit.de>

* [fix] Fix Kaufland engine

Changed Xpath expressions

* [enh] Remove tracking params from Kaufland results

* [enh] Add pagination to Wiby

* [fix] Properly select title_xpath
Co-authored-by: Noémi Ványi <kvch@users.noreply.github.com>

* [fix] Update about section of Invidious

Another website and new documentation

* [fix] Correct engine name in for Rumble (#11)

* [fix] Wording for Filtron error message (#12)

Bump sphinx from 4.1.2 to 4.2.0

Bumps [sphinx](https://github.com/sphinx-doc/sphinx) from 4.1.2 to 4.2.0.
- [Release notes](https://github.com/sphinx-doc/sphinx/releases)
- [Changelog](https://github.com/sphinx-doc/sphinx/blob/4.x/CHANGES)
- [Commits](https://github.com/sphinx-doc/sphinx/compare/v4.1.2...v4.2.0

)

---
updated-dependencies:
- dependency-name: sphinx
  dependency-type: direct:development
  update-type: version-update:semver-minor
...
Signed-off-by: dependabot[bot] <support@github.com>

- Change Libgen provider and use https by default.
- Umcomment Urbandictionary but disable it by default, it is working.
- Uncomment Ebay as it is working correctly.
(For ebay in the future: base_url should be changed from settings.yml  just like peertube or invidious)

Partly-fixes: #2984

Bump jinja2 from 3.0.1 to 3.0.2

Bumps [jinja2](https://github.com/pallets/jinja) from 3.0.1 to 3.0.2.
- [Release notes](https://github.com/pallets/jinja/releases)
- [Changelog](https://github.com/pallets/jinja/blob/main/CHANGES.rst)
- [Commits](https://github.com/pallets/jinja/compare/3.0.1...3.0.2

)

---
updated-dependencies:
- dependency-name: jinja2
  dependency-type: direct:production
  update-type: version-update:semver-patch
...
Signed-off-by: dependabot[bot] <support@github.com>

[fix] use engine-type when looking up supported_languages from JSON files

Сhange in user-agent firefox versions to latest

Dark mode

Closes #61

See merge request e/cloud/my-spot!65

searx/data/engines_languages.json stores language information for
several searchengines in a json endoded dict that maps engine-"types" to
their supported languages; for instance there is an entry "google",
mapping to the supported languages of the google engine.

However, the lookup code did not use the engine 'type' (as in: the
filename searx/engines/<enginetype>.py), but instead the manually
configured engine name from settings.yml when querying. This is
problematic as soon as users start to specify additional engine
instances with custom names in the config file, as for instance
suggested as a workaround for multilingual search in the manual[0]:

> engines:
>   - name : google english
>     engine : google
>     language : english

Here, the engine name "google english" will be used for the lookup in
the json file, which does not exist. The empty supported_languages then
lead to a type error later in the processing callchain.

This patch changes the behaviour to use the engine's entry-"type"
("google" in the above example) for the lookup. This should fix bug #2928.

0: https://searx.github.io/searx/user/search_syntax.html#multilingual-search

add healthcheck endpoint to aid service discovery tools