File provisioner with lxd builder acts if trailing slash is present

[ghost]

This issue was originally opened by @markododa as hashicorp/packer#7530. It was migrated here as a result of the Packer plugin split. The original body of the issue is below.

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Using the lxd builder, i have a simple file provisioner decleration

{ "type": "file", "source": "/root/saltstack/reactor", "destination": "/srv/reactor" },
as per the documentation at https://www.packer.io/docs/provisioners/file.html this should create a folder /srv/reactor with the contents of the source directory.
However /srv/reactor is not created but its contents are in the /srv folder

[rnalrd]

Another problem, probably present due to the same bug, is that if a trailing slash is present, a folder is created anyway, instead of just copying the files.

For example:

{ sources = [ "srcfolder/foo/" ] destination = "dstfolder" }

"dstfolder/foo" is created.