Better handling of non-existent pages/versions in the wiki. This also includes [1708], which was committed by accident :-P
Better handling of non-existent pages/versions in the wiki. This also includes [1708], which was committed by accident :-P

git-svn-id: eda3d06fcef731589ace1b284159cead3416df9b@1709 af82e41b-90c4-0310-8c96-b1721e28e2e2

walty8/trac,walty8/trac,jun66j5/trac-ja,netjunki/trac-Pygit2,jun66j5/trac-ja,jun66j5/trac-ja,walty8/trac,netjunki/trac-Pygit2,netjunki/trac-Pygit2,walty8/trac,jun66j5/trac-ja