TODO/FIXME comments where things don't seem quite right but aren't definitively buggy

* CachedBdbMap.java
    reevaluate if clear() should include close()
* CrawlURI.java
    investigate possible confusion in meaning of isPrerequisite()

engine/src/main/java/org/archive/crawler/datamodel/CrawlURI.java

@@ -564,6 +564,9 @@ implements ProcessorURI, MultiReporter, Serializable, OverlayContext {
     /**
      * Returns true if this CrawlURI is a prerequisite.
      *
+     * TODO:FIXME: code elsewhere is confused whether this means 
+     * that this CrawlURI is a prerquisite for another, or *has* a 
+     * prequisite; clean up and rename as necessary. 
      * @return true if this CrawlURI is a prerequisite.
      */
     public boolean isPrerequisite() {