* doc/guix.texi: Add documentation for wsdd service. * gnu/services/samba.scm (<wsdd-configuration>): New record. (wsdd-service-type): New variable. (wsdd-shepherd-services): New procedure. * gnu/tests/samba.scm (%wsdd-os): Add variable. (run-wsdd-test): New procedure. (%test-wsdd): New variable. Signed-off-by: Lars-Dominik Braun <lars@6xq.net>