Catch API errors relating to abuse filter

git-svn-id: svn://svn.code.sf.net/p/autowikibrowser/code/AWB@9348 5227b50d-9349-4574-b055-4b0a7525e11c
Follow up to last, fix skipping reason when abuse filter blocks edit

git-svn-id: svn://svn.code.sf.net/p/autowikibrowser/code/AWB@9349 5227b50d-9349-4574-b055-4b0a7525e11c
Don't consider targetless links as duplicate wikilinks

git-svn-id: svn://svn.code.sf.net/p/autowikibrowser/code/AWB@9350 5227b50d-9349-4574-b055-4b0a7525e11c