Have vagrant ssh as a backup option for dsh bash on Windows

Fall back to vagrant ssh if winpty is not installed

bin/dsh

@@ -1,6 +1,6 @@
 #!/bin/bash
 
-DSH_VERSION=1.12.9
+DSH_VERSION=1.12.10
 
 # Console colors
 red='\033[0;31m'
@@ -968,7 +968,10 @@ _bash ()
 			# Workaround - run docker via winpty (console.exe) to get a tty console in cygwin.
 			console docker exec -it $container_id bash -i
 		else
-			docker exec -it $container_id bash -i
+			# Drop /cygdrive prefix if the working directory is opened as /cygdrive/<driveletter>/.. instead of /<driveletter>.. 
+			cwd=$(pwd); cwd=${cwd#/cygdrive}
+			command="cd $cwd && docker exec -it $container_id bash -i";
+			vagrant ssh -c "$command"
 		fi
 	fi
 }