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)/
+^(386|68000|68020|alpha|amd64|arm|mips|power|power64|sparc|sparc64)/(bin|lib)(/|$)
+^(acme|sys/src)/(.*/)?[125678vqki]\..*$
+^(acme|sys/src)/.*\.[ao]?[125678vqki]?$
+^(dev|fd|net.*|srv|shr|env|root|proc|boot|mnt|n|bin|usr|cfg|cron|mail|tmp)(/|$)
+^386/(9(pc|boot).*|pbs|mbr|init)
+^amd64/(9pc64|init)
+^acme/bin/(386|68000|68020|alpha|amd64|arm|power|power64|sparc|sparc64)(/|$)
+^adm/(cache|keys|netkeys|secstore|users|whois|timezone/local)(/|$)
+^lib/(ndb|audio|firmware)(/|$)
+^lib/rfc/(drafts|index|rfc.*)(/|$)
+^sys/doc/.*\.(html|ps|pdf|png|out)$
+^sys/lib/(pkg|lp/log|man/lookman/index)(/|$)
+^sys/lib/python/.*\.(pyo|pyc|exe)$
+^sys/log(/|$)
+^sys/man/(searchindex|[1-8]/INDEX.*)$
+^sys/src/.*\.(bits|debug|output|tab\.[hc])$
+^sys/src/pkg(/|$)