[TIPS] Variables can be nested!

[sebastian]

Found out this neat feature of iPXE:

set testvalue0 1234
set testvalue1 4567
set index 0
echo ${testvalue${index}}
>1234
set index 1
echo ${testvalue${index}}
>4567

This can be used to "create" simple encryption/authentication algoritms, even if those aren't "secure", you can for example prevent causual listening in a network. (just as a "obfuscation")