Revert "[SQUASH ME] net_help: choose less mystical name then net_help_csum"

This reverts commit 73af0a38087713fcca97e8adb4cae43d7902f64c.
Revert "net_help: Don't mix booleans and int"

This reverts commit 0758ad44d41d48824d84d1d6bc80303c4b073668.