man: created dos-var manual

man/dos-var.1

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+.Dd $Mdocdate$
+.Dt DOS-VAR 1
+.Os
+.Sh NAME
+.Nm dos-var
+.Nd gets DOS environment variables from WSL
+.Sh SYNOPSIS
+.Nm
+.Op Fl p
+.Ar variable
+.Sh
+.Sh DESCRIPTION
+The
+.Nm
+utility gets a DOS environment variable from within WSL. It can also convert paths to UNIX.
+.Bl -tag -width Ds
+.It Fl p , Fl -path
+The target DOS variable contains a path, and will be converted.
+.It Ar variable
+The name of the target DOS variable.
+.El
+.Sh EXIT STATUS
+.Bl -tag -width Ds
+.It 1
+The target variable is empty.
+.It 2
+No target variable was provided.
+.El
+.Sh EXAMPLES
+Navigate to the Windows user directory:
+.Pp
+.Dl $ cd `dos-var -p USERPROFILE`
+.Pp
+.Sh Authors
+.An -nosplit
+.An Valerie Wolfe Aq Mt sleeplessval@gmail.com