Android user agent for OPDS reader update

Some new user agents and a revised one (all for Android apps)

**User Agent was changed by the app**
UserAgent: `EBookDroid`
Android app: Ebookdroid https://play.google.com/store/apps/details?id=org.ebookdroid

**New User Agents**

UserAgent: `BookReader`
Android app: Gorser Ebookreader - https://play.google.com/store/apps/details?id=com.gorser.ebookreader.epub

UserAgent: `CoolReader`
Android app: Cool Reader https://play.google.com/store/apps/details?id=org.coolreader

UserAgent: `PageTurner`
Android app: PageTurner eBook Reader - https://play.google.com/store/apps/details?id=net.nightwhistler.pageturner.ads

UserAgent:  `books\.ebook\.pdf\.reader`
Android app: EBook Reader & PDF Reader - https://play.google.com/store/apps/details?id=books.ebook.pdf.reader
Note: it also works with `books.ebook.pdf.reader`

UserAgent: `com\.hiwapps\.ebookreader`
Android app: Ebook reader (from Hiwapps)- https://play.google.com/store/apps/details?id=com.hiwapps.ebookreader
Note: app does not support epub format

UserAgent: `OpenBook`
Android app: https://play.google.com/store/apps/details?id=app.angeldroid.openbook

index.php

@@ -11,7 +11,7 @@
     require_once dirname(__FILE__) . '/base.php';
 
     // If we detect that an OPDS reader try to connect try to redirect to feed.php
-    if (preg_match('/(MantanoReader|FBReader|Stanza|Marvin|Aldiko|Moon\+ Reader|Chunky|AlReader|org\.ebookdroid)/', $_SERVER['HTTP_USER_AGENT'])) {
+    if (preg_match('/(MantanoReader|FBReader|Stanza|Marvin|Aldiko|Moon\+ Reader|Chunky|AlReader|EBookDroid|BookReader|CoolReader|PageTurner|books\.ebook\.pdf\.reader|com\.hiwapps\.ebookreader|OpenBook)/', $_SERVER['HTTP_USER_AGENT'])) {
         header('location: feed.php');
         exit();
     }