DOCS: SGML identifier may not exceed 44 characters

Hi folks,

I was working on a little docs patch today, and when I tried to
`make`, openjade choked on an identifier in information_schema.sgml,
which is very much unrelated to my changes:

openjade:information_schema.sgml:828:60:Q: length of name token must
not exceed NAMELEN (44)

Here is a trivial patch to shut openjade up.  This particular id does
not appear to be referred to anywhere else in the docs yet.

The identifier appears to have been introduced in commit
2e2d56fea97f43cf8c40a87143bc10356e4ed4d4 on Feb 9 this year.

I'm using openjade 1.3.2.

Cheers,
BJ

diff --git a/doc/src/sgml/information_schema.sgml
b/doc/src/sgml/information_schema.sgml
index 2febb4c..5fdbd51 100644
--- a/doc/src/sgml/information_schema.sgml
+++ b/doc/src/sgml/information_schema.sgml
@@ -825,7 +825,7 @@
   </table>
  </sect1>

- <sect1 id="infoschema-collation-character-set-applicability">
+ <sect1 id="infoschema-collation-charset-applicability">
   <title><literal>collation_character_set_applicability</literal></title>

   <para>