Add --output=inherit as an alias for --show-output

src/cli.rs

@@ -272,6 +272,7 @@ fn build_command() -> Command<'static> {
                      and apply certain optimizations. To avoid that, consider using \
                      '--output=pipe'.\n\n\
                      pipe: Feed the output through a pipe before discarding it.\n\n\
+                     inherit: Don't redirect the output at all (same as '--show-output').\n\n\
                      <FILE>: Write the output to the given file.",
                 ),
         )

src/options.rs

@@ -274,6 +274,7 @@ impl Options {
             match output {
                 "null" => CommandOutputPolicy::Discard,
                 "pipe" => CommandOutputPolicy::Pipe,
+                "inherit" => CommandOutputPolicy::Forward,
                 path => CommandOutputPolicy::File(path.into()),
             }
         } else {