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>

configure.ac

@@ -58,14 +58,6 @@ AC_ARG_ENABLE(auto_reload,
         AS_HELP_STRING([--enable-auto-reload], [Automatic reload on any .conf change]),,[
 	enable_auto_reload=no])
 
-AC_ARG_ENABLE(progress,
-        AS_HELP_STRING([--enable-progress], [Modern progress display at bootup]),,[
-	enable_progress=no])
-
-AC_ARG_ENABLE(progress-classic,
-	AS_HELP_STRING([--enable-progress-classic], [Pre Finit v3 bootup progress and heading]),,[
-	enable_progress_classic=no])
-
 AC_ARG_ENABLE(watchdog,
         AS_HELP_STRING([--enable-watchdog], [Enable built-in watchdog, uses /dev/watchdog]),,[
 	enable_watchdog=no])
@@ -141,19 +133,6 @@ AS_IF([test "x$enable_fallback_shell" = "xyes"], [
 AS_IF([test "x$enable_auto_reload" = "xyes"], [
         AC_DEFINE(AUTO_RELOAD, 1, [Finit automatically does `initctl reload` on any .conf change])])
 
-AS_IF([test "x$enable_progress" = "xyes"], [
-        AC_DEFINE(PROGRESS_STYLE, 2, [Modern bootup messages, systemd inspired])])
-
-AS_IF([test "x$enable_progress_classic" = "xyes"], [
-	enable_progress=no
-        AC_DEFINE(PROGRESS_STYLE, 1, [Pre Finit v3 bootup messages and heading])])
-
-AS_IF([test "x$enable_progress_classic" = "xyes" -o "x$enable_progress" = "xyes"], [
-        AC_DEFINE(SILENT_MODE,  0, [Display bootup progress, see above for style])
-	], [
-        AC_DEFINE(PROGRESS_STYLE, 0, [Default progress style])
-	AC_DEFINE(SILENT_MODE, 1, [Completely silent until login prompt (default)])])
-
 AS_IF([test "x$enable_watchdog" = "xyes"], [
         AC_DEFINE(BUILTIN_WATCHDOG,  1, [Enable built-in watchdog, kicks on /dev/watchdog])])
 
@@ -258,8 +237,6 @@ Optional features:
   Scripting tool logit..: $enable_logit
   Emergency shell.......: $enable_emergency_shell
   Fallback shell........: $enable_fallback_shell
-  Modern progress.......: $enable_progress
-  Classic progress......: $enable_progress_classic
   Default hostname......: $hostname
   Default runlevel......: $runlevel