As per message to tech-pkg and current-users, convert the wrapper

As per message to tech-pkg and current-users, convert the wrapper
shell script for scotty (and tkined, while here) to real honest-to-God
binary executables from interpreted shell scripts.  This is so that
the #!/usr/pkg/bin/scotty construct can be allowed to work.

The problem is that our execve(2) does not permit an interpreted
script to be used as an interpreter (this is currently undocumented,
but that will be fixed shortly).  The symptom is that the scotty
script (tcl code) gets fed to the shell.