Drop confusing splash cmdline and --enable-progress configure option

This patch reverts back to the progress/status behavior of Finit < v3.0
because this is what most users expect, including the maintainer.  The
resulting code and configure script is a lot simpler to understand and
maintain:

- No more --enable-progress or --enable-progress-classic configure
  flags.  Instead a progress_style variable in helpers.c that can
  be changed at compile time for those that really need it.
- No more 'splash' kernel commnand line option.  This turned out to
  be *very* confusing to many users who believed it was some sort of
  graphical splash screen à la Plymouth.

Also, when Finit debug is enabled we now have a global 'debug' flag
which now alo controls if klogctl() should be called to prevent the
kernel logs to the console or not.

Signed-off-by: Joachim Wiberg <troglobit@gmail.com>

src/service.c

@@ -256,7 +256,7 @@ static int redirect(svc_t *svc)
 			return fredirect(console());
 
 		return lredirect(svc);
-	} else if (log_is_debug())
+	} else if (debug)
 		return fredirect(console());
 #ifdef REDIRECT_OUTPUT
 	else
@@ -393,7 +393,7 @@ static int service_start(svc_t *svc)
 			status = execvp(svc->cmd, args);
 
 		_exit(status);
-	} else if (log_is_debug()) {
+	} else if (debug) {
 		char buf[CMD_SIZE] = "";
 
 		for (i = 0; i < (MAX_NUM_SVC_ARGS - 1) && svc->args[i][0] != 0; i++) {