added proxy cleanup before changing it

modules/upgrade_dist.sh

@@ -15,7 +15,7 @@
 #   * PROXY_SRV_PORT: Working port for general purpose proxy if one declared
 # ------------------------------------------------------------------------------
 
-export VER_upgrade_dist="0.2.3"
+export VER_upgrade_dist="0.2.4"
 
 # As aptitude might fail if clock is too far from real time, we need to depend
 # on ntp
@@ -43,6 +43,14 @@ upgrade_dist()
 		prnt E "Impossible to create directory to receive APT configuration."
 		die 60
 	    )
+	else
+            # Cleanup
+            if [[ -s $proxyfile ]]; then
+                emptyflie $proxyfile
+            fi
+            if [[ $(grep "^Acquire::http::Proxy" /etc/apt/apt.conf) ]]; then
+                sed -i -e "/^Acquire::http::Proxy/d" /etc/apt/apt.conf
+            fi
         fi
         tag_file $proxyfile
         echo "Acquire::http::Proxy \"http://${PROXY_APT}:${PROXY_APT_PORT}\";" >> $proxyfile