Added heini.txt list

cache_domains.json

@@ -5,6 +5,12 @@
 			"description": "Arch and Debian Linux based repositories",
 			"mixed_content": true,
 			"domain_files": ["linux.txt"]
+		},
+				{
+			"name": "heini",
+			"description": "PC-Heini custom domains",
+			"mixed_content": true,
+			"domain_files": ["heini.txt"]
 		},
 		{
 			"name": "arenanet",