Upgrade some URLs to HTTPS (#8202)

* Update http to https in Solarized
* Upgrade http to https for 'Burger In Your Shell'
* Upgrade http to https for tmux.github.io

plugins/emoji-clock/emoji-clock.plugin.zsh

@@ -2,7 +2,7 @@
 #          FILE: emoji-clock.plugin.zsh
 #   DESCRIPTION: The current time with half hour accuracy as an emoji symbol.
 #                Inspired by Andre Torrez' "Put A Burger In Your Shell"
-#                http://notes.torrez.org/2013/04/put-a-burger-in-your-shell.html
+#                https://notes.torrez.org/2013/04/put-a-burger-in-your-shell.html
 #        AUTHOR: Alexis Hildebrandt (afh[at]surryhill.net)
 #       VERSION: 1.0.0
 # -----------------------------------------------------------------------------

plugins/tmux/README.md

 # tmux
 
-This plugin provides aliases for [tmux](http://tmux.github.io/), the terminal multiplexer.
+This plugin provides aliases for [tmux](https://tmux.github.io/), the terminal multiplexer.
 To use it add `tmux` to the plugins array in your zshrc file.
 
 ```zsh

themes/sunrise.zsh-theme

 # Sunrise theme for oh-my-zsh
-# Intended to be used with Solarized: http://ethanschoonover.com/solarized
+# Intended to be used with Solarized: https://ethanschoonover.com/solarized
 
 # Color shortcuts
 R=$fg_no_bold[red]