syntax: regexp
-\.[ao]?[12578vqki]?$
-\.(pyo|pyc|exe)$
-^\.dummy$
-^(dev|fd|net|srv|env|root|mnt|n)/
+^sys/src/.*\.[ao]?[12578vqki]?$
+^sys/src/(.*/)?[12578vqki]\..*$
+^sys/lib/(pkg/|lp/log/|man/lookman/index)
+^sys/lib/python/.*\.(pyo|pyc|exe)$
+^sys/log/
+^sys/man/(searchindex|[1-8]/INDEX.*)$
+^(dev|fd|net|srv|env|root|boot|mnt|n|bin|usr|cfg|cron|mail|tmp)/
^(386|68000|68020|alpha|amd64|arm|power|power64|sparc|sparc64)/(bin|lib)/
+^386/(9(pc|boot).*|pbs|mbr|init)
^acme/bin/(386|68000|68020|alpha|amd64|arm|power|power64|sparc|sparc64)/
+^lib/(ndb|audio)/
+^adm/(users|keys)