Fix setup for BSD

Mounting folders works in vagrant only with /bin/sh, not with /bin/tcsh
or /bin/csh. And only via NFS or RSync, but not with vfs. But NFS
requires a private network.

test-bsd-vm/Vagrantfile

@@ -31,7 +31,7 @@ Vagrant.configure("2") do |config|
 
   # Create a private network, which allows host-only access to the machine
   # using a specific IP.
-  # config.vm.network "private_network", ip: "192.168.33.10"
+  config.vm.network "private_network", ip: "192.168.33.10"
 
   # Create a public network, which generally matched to bridged network.
   # Bridged networks make the machine appear as another physical device on
@@ -43,13 +43,14 @@ Vagrant.configure("2") do |config|
 
   # There is no BASH for root on BSD. We need to set another shell.
   # See https://www.freebsd.org/doc/en/articles/linux-users/shells.html
-  config.ssh.shell = "/bin/csh"
+  config.ssh.shell = "/bin/sh"
 
   # Share an additional folder to the guest VM. The first argument is
   # the path on the host to the actual folder. The second argument is
   # the path on the guest to mount the folder. And the optional third
   # argument is a set of non-required options.
-  config.vm.synced_folder "..", "/vagrant_data"
+  config.vm.synced_folder "..", "/vagrant_data", type: "nfs"
+  config.vm.synced_folder ".", "/vagrant", type: "nfs"
 
   # Provider-specific configuration so you can fine-tune various
   # backing providers for Vagrant. These expose provider-specific options.