I just tried re-building my squid pkg (since the old one had a
security hole) and I got this error message:

Creating user: Web-Cache
usage: useradd -DF [-b basedir] [-e expiry] [-f inactive] [-g group]
        [-r lowuid..highuid] [-s shell] [-L class]
usage: useradd [-G group] [-b basedir] [-c comment] [-d homedir] [-e expiry]
        [-f inactive] [-g group] [-k skeletondir] [-m] [-o] [-p password]
        [-r lowuid..highuid] [-s shell] [-u uid] [-v] user
Creating user: pseudo-user
usage: useradd -DF [-b basedir] [-e expiry] [-f inactive] [-g group]
        [-r lowuid..highuid] [-s shell] [-L class]
usage: useradd [-G group] [-b basedir] [-c comment] [-d homedir] [-e expiry]
        [-f inactive] [-g group] [-k skeletondir] [-m] [-o] [-p password]
        [-r lowuid..highuid] [-s shell] [-u uid] [-v] user
===========================================================================
The following users need to be created for squid-2.5.10nb2:

        Web-Cache: , /nonexistent, /sbin/nologin
        pseudo-user: , /nonexistent, /sbin/nologin
===========================================================================