Reverting threadsafe support - causes httpd to crash.  Asus will have to sort this out, I can't since bwdpi_sqlite is closed source.
Revert "sqlite3: re-enabled threadsafe support.  This fixes minidlna no longer supporting inotify-based updates.  I assume Asus disabled threadsafe support for performance reason - it is also used by the TrendMicro DPI engine."

This reverts commit 5789f9c24c956d4cc8997232254d23ba94017303.