Add nosign option to linux-createpackage and use it in create-dist-package This should prevent doubled signatures in distributed packages which were first signed on the development system with the test key and then from the administrator application.

aheinecke@intevation.de=Andre Heinecke
andre.heinecke@intevation.de=Andre Heinecke
bernhard@intevation.de=Bernhard Reiter
rrenkert@intevation.de=Raimund Renkert
wilde@intevation.de=Sascha Wilde
emanuel@intevation.de=Emanuel Schütze