[FIX] Expand relative paths when importing the content, ensure the URL used follows the redirects

git-svn-id: file:///var/local/code.tiki.org/tikisvn/trunk@51346 b456876b-0849-0410-b77d-98878d47e9d5
[FIX]Typo in English string, split equivalent match in a longer string to match previous ones (separated), and fix in the only language.php with that string translated

git-svn-id: file:///var/local/code.tiki.org/tikisvn/trunk@51347 b456876b-0849-0410-b77d-98878d47e9d5