RFR: [XS,doc] JDK-8225077: fix references to broken link in java.compiler module

[Jonathan Gibbons]

Please review a one line change to fix a 404 link in 
javax/annotation/processing/Filer.java
With this fix, DocCheck finds no errors in the java.compiler module.

JBS: https://bugs.openjdk.java.net/browse/JDK-8225077

-- Jon


Patch inline:

$ hg diff -R open
diff -r a0d4e61acb6b 
src/java.compiler/share/classes/javax/annotation/processing/Filer.java
--- 
a/src/java.compiler/share/classes/javax/annotation/processing/Filer.java 
Thu May 30 12:45:02 2019 -0700
+++ 
b/src/java.compiler/share/classes/javax/annotation/processing/Filer.java 
Thu May 30 13:27:15 2019 -0700
@@ -60,7 +60,7 @@
   * by {@code '/'}; {@code '.'} and {@code '..'} are invalid path
   * segments.  A valid relative name must match the
   * "path-rootless" rule of <a
- * href="http://www.ietf.org/html/rfc3986.txt">RFC 3986</a>, section
+ * href="http://www.ietf.org/rfc/rfc3986.txt">RFC 3986</a>, section
   * 3.3.
   *
   * <p>The file creation methods take a variable number of arguments to