Make it impossible to run KMail twice on the same time on different X displays by creating a lock file because KUniqueApplication doesn't prevent that.
Make it impossible to run KMail twice on the same time on different X displays
by creating a lock file because KUniqueApplication doesn't prevent that.

svn path=/trunk/kdenetwork/kmail/; revision=127131

lefou/kdepim-noakonadi,lefou/kdepim-noakonadi,lefou/kdepim-noakonadi,lefou/kdepim-noakonadi,lefou/kdepim-noakonadi,lefou/kdepim-noakonadi