msudir allows enabled users to easily manage 'setuid'
scripts and binaries. A directory containing scripts or
other executables is created inside the basedir for each
destination user. Any user is then able to invoke the script
'bar' in the directory 'fu' via 'msudir fu/bar'. The script
will be run under the uid and primary gid of the destination
user. Some effort is taken to sanitise the arguments and
environment, but msudir should not be used without an
understanding of the security implication.
