Update dfunc.sgml

——row341至351，调英和翻为：
  <para>
   If this is too complicated for you, you should consider using
   <ulink url="https://www.gnu.org/software/libtool/">
   <productname>GNU Libtool</productname></ulink>,
   which hides the platform differences behind a uniform interface.
  </para>
____________________________________________________________________________-->
  <para>
   如果这对你来说太复杂，你应该考虑使用<ulink url="https://www.gnu.org/software/libtool/">
   <productname>GNU Libtool</productname></ulink>，它会用一个统一的接口隐藏平台差异。
  </para>

Author: chegong18

postgresql/doc/src/sgml/dfunc.sgml

@@ -340,13 +340,13 @@ gcc -G -o foo.so foo.o
 <!--==========================orignal english content==========================
   <para>
    If this is too complicated for you, you should consider using
-   <ulink url="http://www.gnu.org/software/libtool/">
+   <ulink url="https://www.gnu.org/software/libtool/">
    <productname>GNU Libtool</productname></ulink>,
    which hides the platform differences behind a uniform interface.
   </para>
 ____________________________________________________________________________-->
   <para>
-   如果这对你来说太复杂，你应该考虑使用<ulink url="http://www.gnu.org/software/libtool/">
+   如果这对你来说太复杂，你应该考虑使用<ulink url="https://www.gnu.org/software/libtool/">
    <productname>GNU Libtool</productname></ulink>，它会用一个统一的接口隐藏平台差异。
   </para>
  </tip>