Move fix guysoft/OctoPi#424 in to mainline

Author: guysoft

src/modules/base/start_chroot_script

@@ -43,6 +43,10 @@ then
 
   ### Fix SSH outgoing
   echo "IPQoS 0x00" >> /etc/ssh/ssh_config
+  
+  ### Try and fix https://github.com/guysoft/OctoPi/issues/424
+  sed -i "s@ExecStart=/usr/bin/ssh-keygen -A -v@ExecStart=/bin/bash -c ' /usr/bin/ssh-keygen -A -v >> /var/log/regenerate_ssh_host_keys.log 2>\&1'@g" /lib/systemd/system/regenerate_ssh_host_keys.service
+  sed -i "s@ExecStartPost=/bin/systemctl disable regenerate_ssh_host_keys@ExecStartPost=/bin/bash -c 'for i in /etc/ssh/ssh_host_*_key*; do actualsize=\$(wc -c <\"\$i\") ;if [ \$actualsize -eq 0 ]; then echo size is 0 bytes ; exit 1 ; fi ; done ; /bin/systemctl disable regenerate_ssh_host_keys'@g" /lib/systemd/system/regenerate_ssh_host_keys.service
 fi
 
 # Store version buildbase
@@ -81,4 +85,4 @@ if [ $BASE_CONFIG_KEYBOARD != 'default' ]
 then
   echo "Configuring keyboard"
   raspi-config nonint do_configure_keyboard $BASE_CONFIG_KEYBOARD
-fi
+fi