Minor changes

html/scripts/clear_caches.sh

@@ -15,3 +15,4 @@ rm /var/log/apt/*.gz
 rm /var/log/icecast2/*.gz
 rm /var/log/mpd/*.gz
 rm /var/log/samba/*.*
+sync

html/scripts/rpi_system_update.sh

@@ -2,10 +2,13 @@
 service radiod stop
 
 # call clear caches script first
-/usr/share/radio/html/scripts/clear_caches.sh
+/usr/share/radio/html/scripts/clear_caches.sh &&
+
+# to prevent hangs
+dpkg --configure -a &&
 
 # get actual packages list
-apt-get update
+apt-get update &&
 
 # update all installed system packages and reboot
 apt-get -y dist-upgrade