data: add copycats

Closes #436, Closes #432

Author: quenhus

data/github_copycats.txt

@@ -86,6 +86,8 @@
 *://devdoc.net/*
 *://linux-packages.com/*
 *://rst24plus.net/*
+*://rarswi.net/*
+*://opineals.net/*
 ! github-wiki-see.page is a service that allows indexing of GitHub Wikis that GitHub blocks indexing of which is nearly all of them.
 ! At the moment, only about a couple thousand GitHub Wikis are permitted to be indexed out of about 420,000 in existence.
 ! Please visit https://github-wiki-see.page for a more thorough and/or updated explanation of the situation.

data/stackoverflow_copycats.txt

@@ -534,3 +534,4 @@
 *://validsense.com/*
 *://qexe.de/*
 *://mykidq.com/*
+*://echemi.com/*