todo-test: aggregates vs. secondary optimization
Removed correct part from todo test.
Syntax change: only ip/prefix, no longer mask=..

Valid:
- ip = ip/prefixlen;
- nat:x = { ip = ip/prefixlen; } (in network)
Now invalid:
- ip = ip; mask = mask;
- ip = ip/mask;
- nat:x = { ip = ip; } ( in network)