Bug 55884 Loading a user library from file does not warn when overwriting an existing library [build path]
Works in I2004032400010 + plug-in export for I200403240800 Add library 'mylib'. Save it. Change it. Load library from file. ==> should warn that 'mylib' gets changed.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/preferences/UserLibraryPreferencePage.java
NodeList archiveList= libElement.getElementsByTagName(TAG_ARCHIVE);
				for (int k= 0; k < archiveList.getLength(); k++) {
					Node archiveNode= archiveList.item(k);
					if (!(archiveNode instanceof Element)) {
						continue;
					}
					Element archiveElement= (Element) archiveNode;
					
					String path= archiveElement.getAttribute(TAG_ARCHIVE_PATH);
					CPListElement newArchive= new CPListElement(newLibrary, null, IClasspathEntry.CPE_LIBRARY, new Path(path), null);
					newLibrary.add(newArchive);
					
					if (archiveElement.hasAttribute(TAG_SOURCEATTACHMENT)) {
						IPath sourceAttach= new Path(archiveElement.getAttribute(TAG_SOURCEATTACHMENT));
						newArchive.setAttribute(CPListElement.SOURCEATTACHMENT, sourceAttach);
					}
					if (archiveElement.hasAttribute(TAG_JAVADOC)) {
						try {
							URL javadoc= new URL(archiveElement.getAttribute(TAG_JAVADOC));
							newArchive.setAttribute(CPListElement.JAVADOC, javadoc);
						} catch (MalformedURLException e) {
							
						}
					}
				}
			}
			return result;
		}
		public List getLoadedLibraries() {
			return fExportImportList.getCheckedElements();