[tex-live] No rule to make target `ppower4', needed by `all'. Stop

[Karl Berry]

    The difference between install-linkedscripts and
    install-linked-sys-scripts is the line:

There has to be a better way than repeating all that shell code.  I'll
look at it.

    LaTeX has been untouched for fourteen years.        And there is Context.

Nonsense.  Both of those are updated regularly.  Ppower4 has been
literally untouched since 2002, judging by the dates on CTAN.

    I propose to keep it, unless there are any good reasons to remove it.

True enough.

    BTW, I added the svn:executable flag to everything in Master/bin but
    it's certainly better to extend ~/.subversion/config.  What I have now is:

I don't agree it is "certainly better".  In my mind, the more
independent of the config file the repo can be, the better.

    This is new.  It's painful to set these properties manually.  Maybe it
    makes sense to put it into http://tug.org/texlive/svn/config.txt .

No.  It is highly desirable for keyword expansion to be enabled explicitly.