[bp/r51209][ENH]Improve description of the zend_mail_queue feature for the cases when smtp is used for email delivery from Tiki. Thanks Nethanel (lrrcenter) for feedback on how to use this feature. Fixed the equivalent string in the korean translation. Catalan translation will be fixed in a subsequent commit (with other changes in that lang file)

git-svn-id: file:///var/local/code.tiki.org/tikisvn/branches/12.x@51211 b456876b-0849-0410-b77d-98878d47e9d5
a few fixes

git-svn-id: file:///var/local/code.tiki.org/tikisvn/branches/12.x@51213 b456876b-0849-0410-b77d-98878d47e9d5