Use HTTPS to download XML Schema

Author: garydgregory

src/site/xdoc/download_net.xml

@@ -58,7 +58,7 @@ limitations under the License.
 -->
 <document xmlns="http://maven.apache.org/XDOC/2.0"
   xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-  xsi:schemaLocation="http://maven.apache.org/XDOC/2.0 https://maven.apache.org/xsd/xdoc-2.0.xsd">
+  xsi:schemaLocation="https://maven.apache.org/XDOC/2.0 https://maven.apache.org/xsd/xdoc-2.0.xsd">
   <properties>
     <title>Download Apache Commons Net</title>
     <author email="[email protected]">Apache Commons Team</author>

src/site/xdoc/issue-tracking.xml

@@ -43,7 +43,7 @@ limitations under the License.
 -->
 <document xmlns="http://maven.apache.org/XDOC/2.0"
   xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-  xsi:schemaLocation="http://maven.apache.org/XDOC/2.0 https://maven.apache.org/xsd/xdoc-2.0.xsd">
+  xsi:schemaLocation="https://maven.apache.org/XDOC/2.0 https://maven.apache.org/xsd/xdoc-2.0.xsd">
   <properties>
     <title>Apache Commons Net Issue tracking</title>
     <author email="[email protected]">Apache Commons Team</author>

src/site/xdoc/mail-lists.xml

@@ -41,7 +41,7 @@ limitations under the License.
 -->
 <document xmlns="http://maven.apache.org/XDOC/2.0"
   xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-  xsi:schemaLocation="http://maven.apache.org/XDOC/2.0 https://maven.apache.org/xsd/xdoc-2.0.xsd">
+  xsi:schemaLocation="https://maven.apache.org/XDOC/2.0 https://maven.apache.org/xsd/xdoc-2.0.xsd">
   <properties>
     <title>Apache Commons Net Mailing Lists</title>
     <author email="[email protected]">Apache Commons Team</author>