[MJAVADOC-607] followLinks fix to get redirect target breaks for cert…

…ain sites

Signed-off-by: Doychin Bondzhev <doychin@dsoft-bg.com>

src/main/java/org/apache/maven/plugins/javadoc/AbstractJavadocMojo.java

@@ -6345,6 +6345,11 @@ private Set<String> followLinks( Set<String> links )
             {
                 // only print in debug, it should have been logged already in warn/error because link isn't valid
                 getLog().debug( "Could not follow " + link + ". Reason: " + e.getMessage() );
+
+                // Even when link produces error it should be kept in the set because the error might be caused by
+                // incomplete redirect configuration on the server side.
+                // This partially restores the previous behaviour before fix for MJAVADOC-427
+                redirectLinks.add( link );
             }
         }
         return redirectLinks;