syntax: regexp
\.[ao]?[12578vqki]?$
\.(pyo|pyc|exe)$
^\.dummy$
^(dev|fd|net|srv|env|root|mnt|n)/
^(386|68000|68020|alpha|amd64|arm|power|power64|sparc|sparc64)/(bin|lib)/
^acme/bin/(386|68000|68020|alpha|amd64|arm|power|power64|sparc|sparc64)/