Cleaned up a few more Bugzilla mentions.

BUGS.txt

@@ -11,6 +11,6 @@ You may also find help at the SDL forums/mailing list:
 
     https://discourse.libsdl.org/
 
-Bug reports are welcome here, but we really appreciate if you use Bugzilla, as
- bugs discussed on the mailing list may be forgotten or missed.
+Bug reports are welcome here, but we really appreciate if you use the issue
+ tracker, as bugs discussed on the mailing list may be forgotten or missed.
 

docs/README.md

@@ -54,7 +54,7 @@ If you need help with the library, or just want to discuss SDL related
 issues, you can join the [developers mailing list](http://www.libsdl.org/mailing-list.php)
 
 If you want to report bugs or contribute patches, please submit them to
-[bugzilla](https://bugzilla.libsdl.org/)
+[our bug tracker](https://github.com/libsdl-org/SDL/issues)
 
 Enjoy!
 

src/video/android/SDL_androidgl.c

@@ -69,7 +69,7 @@ Android_GLES_SwapWindow(_THIS, SDL_Window * window)
 
     /* The following two calls existed in the original Java code
      * If you happen to have a device that's affected by their removal,
-     * please report to Bugzilla. -- Gabriel
+     * please report to our bug tracker. -- Gabriel
      */
 
     /*_this->egl_data->eglWaitNative(EGL_CORE_NATIVE_ENGINE);