Translate docs with po4a (#2590)

* [i18n] Add docs po4a script

* Add proof of concept

* Add a few more translations

* Hush ShellCheck and shfmt

* Make that list po4a-friendly

* drat, this document could've probably been auto-generated

* Definitive proof that it's translated from French ;-)

* Add some brand spanking new French translation

* More translation

* Mostly finish that config page

* Fix up FAQ

* More contributing

* Dev first steps

* Let's ignore that admin stuff at the very least for now

* Translate release new version, make French the source first and copy all translations

Then replace French with English in the source.

Much quicker than any alternative route.

* And add the English translation

* Minor stylistic leftover from French

* Most of first steps

* Forgot the extensions

* Use po4a 0.56 to get rid of way too many newlines

* Fix up those newlines

* No point linking to Firefox integration anymore from the new user guide

* Start on main view

* A bunch of main view stuff

* More main view

* And some subscriptions before going to bed

* First steps for devs

* More dev first steps

* Incomplete French → English dev/GH translation

Because I need to ask about that mailing list thing

* Fix typo in docs/en/developers/02_Github.md

* Translate & complete devs/github to English

* Fix up most of extensions

* Is that supposed to be a non-breaking space? Let's see

* Match up some users/mobile access

* More users/mobile access

* Add fresh French translation to Fever API

* Fix typo

* Match frontend todo thingies

* Fix a typo

* Some extensions strings

* Remove Fx subscription service from the docs

Cf. https://github.com/FreshRSS/FreshRSS/pull/2606

* Add translation for https://github.com/FreshRSS/FreshRSS/pull/2643

* fix typo as per https://github.com/FreshRSS/FreshRSS/pull/2643#discussion_r345433009

* Add some more French translations

* Update French translation as per @aledeg comment https://github.com/FreshRSS/FreshRSS/pull/2590#discussion_r345465909

* Translate some of the meaningless stuff

* Translate the rest of contributing.md to French

* Fix conflicts

* Translate Docker first steps to French

* Update with change from #2665

* Add @aledeg corrections

* Overlooked a couple @aledeg corrections thanks to GitHub autohide

* Latest @aledeg suggestions

1 files changed, 1 insertions, 21 deletions

diff --git a/docs/en/users/04_Subscriptions.md b/docs/en/users/04_Subscriptions.md
index 4b40f691a..be8efe0a6 100644
--- a/docs/en/users/04_Subscriptions.md
+++ b/docs/en/users/04_Subscriptions.md
@@ -8,7 +8,7 @@
 
 # Use bookmarklet
 
-Bookmarklets are little scripts that you can execute to perform useful or frivolous tasks. FreshRSS offers a bookmarklet for subscribing to newsfeeds.
+Bookmarklets are little scripts that you can execute to perform various tasks. FreshRSS offers a bookmarklet for subscribing to newsfeeds.
 
  1. Open "Subscriptions management".
  2. Click on "Subscription tools".
@@ -17,23 +17,3 @@ Bookmarklets are little scripts that you can execute to perform useful or frivol
 # Feed management
 
 **TODO**
-
-# Firefox subscription service
-
-NB: From version 63 and onwards Firefox has removed the ability to add your own subscription services that aren't standalone programs. This makes it impossible to add FreshRSS to the feed preview/subscription page, though this page is set to be removed from version 64 anyway (see [bugzilla](https://bugzilla.mozilla.org/show_bug.cgi?id=1477667)). You can use the bookmarklet mentioned above for an easy way to subscribe to feeds.
-
-If you're using a version pre-63 you can manually add your FreshRSS app to the list of Firefox subscription services, which enables you to subscribe to sites which provide a feed link using the Firefox built-in "Subscribe" button. An in-depth process is described in the [official documentation](https://developer.mozilla.org/en-US/Firefox/Releases/2/Adding_feed_readers_to_Firefox) but you can use the following steps:
-
-  1. Open about:config in Firefox
-
-  2. Search for "browser.contentHandlers.types." and note the highest number following the returned strings (ie if yo see browser.contentHandlers.types.1.something up to browser.contentHandlers.types.5.somethingelse etc. the highest number is 5). Your contentHandler will have to have a free number so just pick one higher than currently registered (you would chose six in above example).
-
-  3. You will have to add three new strings to your about config (replace %NUMBER% with the number from previous step and example.com with your installation address):
-
-  | Preference name                              | Value                                                      | Note                                                      |
-  | -------------------------------------------- | ---------------------------------------------------------- | --------------------------------------------------------- |
-  | browser.contentHandlers.types.%NUMBER%.title | **FreshRSS**                                               | Use any name you would like (ie. "My feeds")              |
-  | browser.contentHandlers.types.%NUMBER%.type  | **application/vnd.mozilla.maybe.feed**                     | Do not change this value!                                 |
-  | browser.contentHandlers.types.%NUMBER%.uri   | **http://EXAMPLE.COM/FreshRss/i?c=feed&a=add&url_rss=%s** | Replace base url with yours and switch to https (if used) |
-
-  4. Restart Firefox and you can subscribe to sites with the Firefox built-in "Subscribe" button. Just select the name you set under the first Preference name from the dropdown (you can also make it default with the checbox) and you will be redirected to FreshRSS subscription settings (you must be logged in).