Merged r11527 from trunk to 2.3-stable (#13338, #13329)

Ruby2.0: remove "warning: class variable access from toplevel" in lib/plugins/rfpdf/lib/tcpdf.rb.

Contributed by Jun NAITOH.

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/branches/2.3-stable@11533 e93f8b46-1217-0410-a6f0-8f06a7374b81
Merged r11528 and r11529 from trunk to 2.3-stable (#13343, #13339)

Vietnamese translation for 2.2-stable and 2.3-stable updated by Minh Thien Nguyen.

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/branches/2.3-stable@11534 e93f8b46-1217-0410-a6f0-8f06a7374b81
Merged r11530 from trunk to 2.3-stable (#13339)

Vietnamese translation changed by Minh Thien Nguyen.

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/branches/2.3-stable@11535 e93f8b46-1217-0410-a6f0-8f06a7374b81