update some urls to https (fixes lichess-org#3529)

CONTRIBUTING.md

@@ -18,7 +18,7 @@ Contributing
 
 ## I want to suggest a feature for Lichess
 
-Issue tickets on features that lack potential or effectiveness are not useful and may be closed. Discussions regarding whether a proposed new feature would be useful can be done on the [Lichess Feedback Forum](http:https://lichess.org/forum/lichess-feedback) to gauge feedback. The developers may also discuss the idea there, and if it is exemplary, a corresponding issue ticket will be made. __When you're ready, [make an issue ticket](https://github.com/ornicar/lila/issues/new)__ and link relevant, constructive comments regarding it in your issue ticket (such as a detailed Reddit post; linking to an empty forum thread with only your own commentary adds no value). Make sure that the feature you propose:
+Issue tickets on features that lack potential or effectiveness are not useful and may be closed. Discussions regarding whether a proposed new feature would be useful can be done on the [Lichess Feedback Forum](https:https://lichess.org/forum/lichess-feedback) to gauge feedback. The developers may also discuss the idea there, and if it is exemplary, a corresponding issue ticket will be made. __When you're ready, [make an issue ticket](https://github.com/ornicar/lila/issues/new)__ and link relevant, constructive comments regarding it in your issue ticket (such as a detailed Reddit post; linking to an empty forum thread with only your own commentary adds no value). Make sure that the feature you propose:
 
 1. Is __effective in delivering a goal__. A feature that adds nothing new is purely fancy; please develop a userscript or userstyle for your personal use instead.
 2. Doesn't rely on mundane assumptions. Non-technical people have the tendency to measure how difficult / easy a feature is to implement based on their unreliable instincts, and such assumptions wastes everyone's time. __Point out what needs to happen__, not what you think will happen.

app/views/plan/features.scala.html

@@ -81,10 +81,10 @@ <h1 data-icon="">Website</h1>
  <a href="https://lichess.org/blog/WFvLpiQAACMA8e9D/learn-from-your-mistakes">Learn from your mistakes</a>
  }
  @tr(unlimited) {
- <a href="http:https://lichess.org/blog/V0KrLSkAAMo3hsi4/study-chess-the-lichess-way">Studies (shared and persistent analysis)</a>
+ <a href="https:https://lichess.org/blog/V0KrLSkAAMo3hsi4/study-chess-the-lichess-way">Studies (shared and persistent analysis)</a>
  }
  @tr(unlimited) {
- <a href="http:https://lichess.org/blog/VmZbaigAABACtXQC/chess-insights">Chess insights (detailed analysis of your play)</a>
+ <a href="https:https://lichess.org/blog/VmZbaigAABACtXQC/chess-insights">Chess insights (detailed analysis of your play)</a>
  }
  @tr(check) {
  <a href="@routes.Learn.index">All chess basics lessons</a>

app/views/video/show.scala.html

@@ -15,7 +15,7 @@
  <a class="is4 text lichess_title" data-icon="i" href="@[email protected]">Video library</a>
  </div>
  <iframe id="ytplayer" type="text/html" width="792" height="482"
- src="//www.youtube.com/embed/@video.id?autoplay=1&origin=http:https://lichess.org&[email protected]"
+ src="//www.youtube.com/embed/@video.id?autoplay=1&origin=https:https://lichess.org&[email protected]"
  frameborder="0" allowfullscreen></iframe>
  <h1 class="title">@video.title</h1>
  <div class="meta">

bin/cli-prod

@@ -3,4 +3,4 @@
 COMMAND=$*
 PASSWORD=$LILA_CLI_PASSWORD
 
-curl -d "password=$PASSWORD&command=$COMMAND" http:https://lichess.org/cli
+curl -d "password=$PASSWORD&command=$COMMAND" https:https://lichess.org/cli