Chad - compute heterogeneous asynchronous datagrams

The system will start Chad automatically when entering a multi-user run-level.

• -f --foreground stay in the foreground
• -s --single-user disable individual chadtabs for each user

Unless started with the s or single-user option, Chad searches its spool area (/var/spool/chad/chadtabs, by default) for chadtab files (which are named after the accounts in /etc/passwd); valid chadtabs found loaded into memory. The chadtabs in this directory should not be directly accessible by users - the chadtab command should be used to access and update them.

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