Some operating systems have a limit on the length of a command line. To
circumvent this, or simply for reasons of flexibility, a control file may be
specified from which arguments are drawn. This file does not support the full
syntax of the command line. Commands are separated by whitespace, quotation
marks may be used if an argument contains a space, and the sequence \"
may be used to introduce a genuine quotation mark in such an argument.
Several -control arguments may be specified, and may be mixed in with
conventional command-line arguements. The commands in each control file are
considered in the order in which they are given, after all conventional
arguements have been processed.