caching now works for encoded URLs also.
Issue 1352


git-svn-id: svn://svn.code.sf.net/p/htmlunit/code/trunk@8523 5f5364db-9458-4db8-a492-e30667be6df6
Some debug log output added if HTMLDocument.canAlreadyBeParsed(String) returns false.
Issue 1524


git-svn-id: svn://svn.code.sf.net/p/htmlunit/code/trunk@8524 5f5364db-9458-4db8-a492-e30667be6df6
new test (NYI so far)

git-svn-id: svn://svn.code.sf.net/p/htmlunit/code/trunk@8525 5f5364db-9458-4db8-a492-e30667be6df6
validated in ie8

git-svn-id: svn://svn.code.sf.net/p/htmlunit/code/trunk@8526 5f5364db-9458-4db8-a492-e30667be6df6