Change \otsref to \otsoref and modernize comment.

(In the OTS SVN tree, r21800 adjusts for this change.)

The original motivation for this change was to avoid confusion with
\otsparenref and some other related commands that I'm about to add.
But then when I looked more closely, I realized that the documentation
for \otsref (now \otsoref) was quite out-of-date too, so I updated it.

latex/ots.sty

@@ -213,7 +213,7 @@ trim=0cm 11cm 19.3cm 11cm, scale=0.09]{otslogo.pdf}}}
 
 % Use this for including source references that you don't want to
 % include in the output, for example the unique codes used by
-% `ots-set-ref' and `ots-find-ref' from ${OTS_DIR}/utils/ots.el.
+% `oref-set-ref' and `oref-find-ref' from oref.el in ots-tools.
 %
 % This is just to quickly preserve traceability while writing; later,
 % we might convert some of these references to reader-visible form,
@@ -223,10 +223,7 @@ trim=0cm 11cm 19.3cm 11cm, scale=0.09]{otslogo.pdf}}}
 % None of that is handled by this command.  All this command does is
 % enable us to keep track of where a piece of information came from,
 % with a minimum of interference to the flow of writing process.
-%
-% (See also the setting of `ots-ref-root' at the bottom of the .ltx
-% file under "Local Variables", which makes `ots-find-ref' work here.)
-\newcommand{\otsref}[1]{}
+\newcommand{\otsoref}[1]{}
 
 % I love this so much.  Here's what's going on:
 %