       setopt [ {+|-}options ] [ name ... ]
              Set the options for the shell.  All options  speci-
              fied  either  with flags or by name are set.  If no
              arguments are supplied, the names  of  all  options
              currently  set  are printed.  In option names, case
              is insignificant, and all underscore characters are
              ignored.  If the -m flag is given the arguments are

              taken as patterns (should  be  quoted  to  preserve
              them  from  being interpreted as glob patterns) and
              all options with names matching these patterns  are
              set.
