use https

git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@1893673 13f79535-47bb-0310-9956-ffa450edef68

poi/src/main/java/org/apache/poi/hssf/model/InternalSheet.java

@@ -55,7 +55,7 @@ import static org.apache.logging.log4j.util.Unbox.box;
  * The structures of the highlevel API use references to this to perform most of their
  * operations.  Its probably unwise to use these low level structures directly unless you
  * really know what you're doing.  I recommend you read the Microsoft Excel 97 Developer's
- * Kit (Microsoft Press) and the documentation at http://sc.openoffice.org/excelfileformat.pdf
+ * Kit (Microsoft Press) and the documentation at https://sc.openoffice.org/excelfileformat.pdf
  * before even attempting to use this.
  *
  * @see InternalWorkbook

poi/src/main/java/org/apache/poi/hssf/model/InternalWorkbook.java

@@ -74,7 +74,7 @@ import org.apache.poi.util.RecordFormatException;
  * The structures of the highlevel API use references to this to perform most of their
  * operations.  Its probably unwise to use these low level structures directly unless you
  * really know what you're doing.  I recommend you read the Microsoft Excel 97 Developer's
- * Kit (Microsoft Press) and the documentation at http://sc.openoffice.org/excelfileformat.pdf
+ * Kit (Microsoft Press) and the documentation at https://sc.openoffice.org/excelfileformat.pdf
  * before even attempting to use this.
  *
  * @see HSSFWorkbook

poi/src/main/java/org/apache/poi/hssf/record/chart/ChartRecord.java

@@ -32,7 +32,7 @@ import org.apache.poi.util.LittleEndianOutput;
  * The chart record is used to define the location and size of a chart.<p>
  *
  * Chart related records don't seem to be covered in either the
- * <A HREF="http://sc.openoffice.org/excelfileformat.pdf">OOO</A>
+ * <A HREF="https://sc.openoffice.org/excelfileformat.pdf">OOO</A>
  *  or the
  * <A HREF="http://download.microsoft.com/download/0/B/E/0BE8BDD7-E5E8-422A-ABFD-4342ED7AD886/Excel97-2007BinaryFileFormat(xls)Specification.pdf">MS</A>
  *  documentation.