1. If update.sh failed to determine the PREFIX, it didn't realize it
had failed. This is arguably caused by a shell bug in processing
the statement
export PREFIX=$(expr $0 : "\(/.*\)/etc/cvsup/update\.sh\$")
This statement always succeeds even if the "expr" command fails.
Moving the "export" to a separate statement makes it work.
2. If the system had no "/home" directory, the pkg-install script
would create it with mode 0700, making ~cvsupin inaccessible to its
owner. A user ran into this bug when installing cvsup-mirror into a
jail.
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