Rename `silent' mode to `silent-rules' mode. * automake.in (define_verbose_var, verbose_flag) (define_verbose_tagvar, handle_options, handle_languages) (handle_configure, parse_arguments): Rename the `silent' option to `silent-rules', so it coincides with the `--silent-rules' command line option; adjust all code and comments. * lib/Automake/Options.pm (_process_option_list): Likewise. * doc/automake.texi (Invoking Automake, Libtool Flags, Options): Likewise. * NEWS: Adjust. * tests/dollarvar.test, tests/silent.test, tests/silent2.test, tests/silent3.test, tests/silent4.test, tests/silent5.test, tests/silent6.test, tests/silent7.test: Likewise. Suggestion by Jan Engelhardt. Signed-off-by: Ralf Wildenhues <Ralf.Wildenhues@gmx.de>