HTTP refused by Maven Central (breaks nightlies)

check.xml

@@ -150,7 +150,7 @@
 
   <target name="init-ivy">
     <property name="ivy.version"  value="2.5.0"/>
-    <property name="ivy.jar.url"  value="http://repo1.maven.org/maven2/org/apache/ivy/ivy/${ivy.version}/ivy-${ivy.version}.jar"/>
+    <property name="ivy.jar.url"  value="https://repo1.maven.org/maven2/org/apache/ivy/ivy/${ivy.version}/ivy-${ivy.version}.jar"/>
     <property name="ivy.jar.dir"  value="${build.dir}/ivy"/>
     <property name="ivy.jar.file" value="${ivy.jar.dir}/ivy.jar"/>
     <mkdir dir="${ivy.jar.dir}"/>