mkprojdir, mkacct-cntrl, mkgroup, and group-update into a set of new
scripts that are more specific to their intended operation, and strive
to do less work.

1. mkacct - Replaces mkacct-cntrl. This script no longer does any
   group stuff. All it does is create new accounts, or update the
   password and gecos fields of existing accounts. Usage is the same
   as it was: "mkacct <userid>", and is typically invoked from the web
   interface via the approveuser form.

2. mkgroup - Replaces group-update. This script creates new groups,
   either for the main project when it is approved, or for subgroup
   creation. This script does not alter the group membership. Usage
   is typically from the web interface, but mkgroup can be invoked
   from the command line: "mkgroup [-b | -a] <pid> <gid>" where -b
   puts it in the background and sends email later, while -a just
   captures the log and emails. This "audit" feature is going to find
   its way into...