Implement etag setting on write close for smb backend
Implement etag setting on write close for smb backend

Original git commit by Alexander Larsson <alexl@redhat.com> at 1185359446 +0200

svn path=/trunk/; revision=711

gicmo/gvfs,halfline/gvfs,philipl/gvfs,xkahn/gvfs-cmis,thiblahute/gvfs,cpatulea/gvfs,philipl/gvfs,gicmo/gvfs,xkahn/gvfs-cmis,halfline/gvfs,xkahn/gvfs-cmis,gicmo/gvfs,cpatulea/gvfs,thiblahute/gvfs,xkahn/gvfs-cmis,halfline/gvfs,gicmo/gvfs,philipl/gvfs