RFR [13] 8153508: ContentHandler API contains link to private contentPathProp

[Chris Hegarty]

This review request is to resolve a documentation regression in Java 9,
resulting from part of the changes for 8132478, where {@value
java.net.URLConnection#contentPathProp} was inadvertently replaced with
{@link java.net.URLConnection#contentPathProp}. The former will inline
with the constant field value, where the latter will link to the
( private ) field.

The fix is to just revert the incorrect change.

--- a/src/java.base/share/classes/java/net/ContentHandler.java
+++ b/src/java.base/share/classes/java/net/ContentHandler.java
@@ -47,7 +47,7 @@
  * If no content handler could be {@linkplain URLConnection#getContent() found},
  * URLConnection will look for a content handler in a user-definable set of places.
  * Users can define a vertical-bar delimited set of class prefixes
- * to search through by defining the <i>{@link java.net.URLConnection#contentPathProp}</i>
+ * to search through by defining the <i>{@value java.net.URLConnection#contentPathProp}</i>
  * property. The class name must be of the form:
  * <blockquote>
  *     <i>{package-prefix}.{major}.{minor}</i>

-Chris.