Repatch (from linux) of OSX IRAF

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+.help "which,whereis" Mar04 language
+.ih
+NAME
+.nf
+which -- locate a task in the package list
+whereis -- locate all occurrences of a task in the package list
+.fi
+.ih
+USAGE
+.nf
+which [task] [...]
+whereis [task] [...]
+.fi
+.ih
+PARAMETERS
+.ls task
+Name of task to be located.
+.le
+.ih
+DESCRIPTION
+The \fIwhich\fR command returns the first occurrence of a task in the currently
+loaded package list.  The \fIwhereis\fR command returns all occurrences of that
+task in the package list.  More than one task may be supplied on the command
+line, unique abbreviations for task names are permitted.
+
+These commands are similar to the UNIX commands of the same name.  Users should
+note that \fIonly\fR the currently loaded packages are searched.
+.ih
+EXAMPLES
+1.  Find out which package contains the HEAD task.
+.nf
+
+	cl> which head
+	system
+.fi
+
+2.  Find all currently loaded package which contain the SPLOT task.
+.nf
+
+	cl> whereis splot
+	echelle onedspec
+.fi
+.ih
+SEE ALSO
+.endhelp