Rename "Libigot Debug Mode Changes" patch to "Debug Mode"

Signed-off-by: Steven Downer <grinch@outlook.com>
Rearrange imports and fix comments

Signed-off-by: Steven Downer <grinch@outlook.com>
Resolve ClassCastException when netty is disabled.

Signed-off-by: Steven Downer <grinch@outlook.com>