Revert 1fbc30f because the

bmomjian · bmomjian · commit 39d0653d058b · 2012-08-30T17:05:51.000-04:00
--enable-shared is about Plyton's configure, not ours.
diff --git a/doc/src/sgml/installation.sgml b/doc/src/sgml/installation.sgml
@@ -234,7 +234,8 @@ su - postgres
      </para>
 
      <para>
-      On some
+      If you have problems, run <productname>Python</> 2.3 or later's
+      configure using the <literal>--enable-shared</> flag.  On some
       operating systems you don't have to build a shared library, but
       you will have to convince the <productname>PostgreSQL</> build
       system of this.  Consult the <filename>Makefile</filename> in
