scripts: move flash.start script away from control scripts

Origin commit data
------------------
Commit: fa17da4f0a
Author: vanhofen <vanhofen@gmx.de>
Date: 2021-09-26 (Sun, 26 Sep 2021)

Origin message was:
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- scripts: move flash.start script away from control scripts

data/control/Makefile.am

@@ -8,7 +8,6 @@ install_SCRIPTS = \
 	audioplayer.end \
 	deepstandby.on \
 	deepstandby.off \
-	flash.start \
 	inactivity.on \
 	migration.sh \
 	movieplayer.start \

data/scripts/Makefile.am

@@ -12,6 +12,9 @@ install_SCRIPTS = \
 	wakeup.sh \
 	install.sh 
 
+install_SCRIPTS += \
+	start_flash.sh \
+
 if BOXMODEL_CST_HD2
 install_SCRIPTS += \
 	backup_flash.sh \

data/scripts/start_flash.sh

@@ -3,5 +3,5 @@
 # kill start script first to ignore neutrino's exit codes
 killall start_neutrino
 
-# run shutdown routine depending on flagfile
+# run shutdown routine
 /etc/init.d/rcK

src/global.h

@@ -47,7 +47,6 @@
 #define NEUTRINO_APP_START_SCRIPT "neutrino.start"
 
 // control scripts w/o counterparts in /var
-#define NEUTRINO_ENTER_FLASH_SCRIPT CONTROLDIR "/flash.start"
 #define NEUTRINO_CONF_MIGRATION_SCRIPT CONTROLDIR "/migration.sh"
 
 #define COVERDIR_TMP "/tmp/.cover"

src/neutrino.cpp

@@ -5690,7 +5690,9 @@ void stop_daemons(bool stopall, bool for_flash)
 		if (!backup_flash_sh.empty())
 			system(backup_flash_sh.c_str()); //don't fork
 #endif
-		my_system(NEUTRINO_ENTER_FLASH_SCRIPT);
+		std::string start_flash_sh = find_executable("start_flash.sh");
+		if (!start_flash_sh.empty())
+			my_system(start_flash_sh.c_str());
 	}
 
 	InfoClock->enableInfoClock(false);