Read GS/pA expire value

src/freedombone-app-gnusocial

 }
 
 function configure_interactive_gnusocial {
+    read_config_param GNUSOCIAL_EXPIRE_MONTHS
     while true
     do
         data=$(tempfile 2>/dev/null)

src/freedombone-app-postactiv

 }
 
 function configure_interactive_postactiv {
+    read_config_param "POSTACTIV_EXPIRE_MONTHS"
     while true
     do
         data=$(tempfile 2>/dev/null)