Doccumentation Patch for Create Function

Hi all,

Please find attached diffs to the documentation that are intended to
accompany the CREATE FUNCTION patch that I submitted earlier.  I stuck
with the syntax in the original patch rather than the alternative
syntax suggested by Andreas.

When I was altering the xfunc.sgml page I came across this:

      <title>Name Space Conflicts</title>

      <para>
      As of <productname>Postgres</productname> v6.5,
      <command>CREATE FUNCTION</command> can decouple a C language
      function name from the name of the entry point. This is now the
      preferred technique to accomplish function overloading.
      </para>

which seems to suggest that someone had a similar idea in the past.  I
could find no evidence of this functionality in the 6.5 code though

Bernard Frankpitt