* Because we install our own ldlinux.sys, we must ensure that if the ISO contains
an ldlinux.sys in the root directory, this file is not copied over. However, our
comparison for the 'ldlinux.sys' string was case sensitive which means that some
ISOs such as R-Drive Image boot ISO, that use 'LDLINUX.SYS' were trying write over
our file, resulting in a file extraction failure.
* This patch ensures that the string comparison for 'ldlinux.sys' is case insensitive.
* Also add 512px sized icon (upscaled using waifu2x)
