codecvt.xml: Switch pubs.opengroup.org to https.

	* doc/xml/manual/codecvt.xml: Switch pubs.opengroup.org to https.
	* doc/xml/manual/locale.xml (LC_ALL): Ditto.
	* doc/xml/manual/messages.xml: Ditto.

From-SVN: r277476

libstdc++-v3/ChangeLog

+2019-10-26  Gerald Pfeifer  <gerald@pfeifer.com>
+
+	* doc/xml/manual/codecvt.xml: Switch pubs.opengroup.org to https.
+	* doc/xml/manual/locale.xml (LC_ALL): Ditto.
+	* doc/xml/manual/messages.xml: Ditto.
+	
 2019-10-26  John David Anglin  <danglin@gcc.gnu.org>
 
 	* config/abi/post/hppa-linux-gnu/baseline_symbols.txt: Update.

libstdc++-v3/doc/xml/manual/codecvt.xml

@@ -595,7 +595,7 @@ codecvt usage.
   <biblioentry>
       <title>
 	<link xmlns:xlink="http://www.w3.org/1999/xlink"
-	      xlink:href="http://pubs.opengroup.org/onlinepubs/9699919799/">
+	      xlink:href="https://pubs.opengroup.org/onlinepubs/9699919799/">
       System Interface Definitions, Issue 7 (IEEE Std. 1003.1-2008)
 	</link>
       </title>

libstdc++-v3/doc/xml/manual/locale.xml

@@ -560,7 +560,7 @@ global locale" (emphasis Paolo), that is:
   <biblioentry>
       <title>
 	<link xmlns:xlink="http://www.w3.org/1999/xlink"
-	      xlink:href="http://pubs.opengroup.org/onlinepubs/9699919799/">
+	      xlink:href="https://pubs.opengroup.org/onlinepubs/9699919799/">
       System Interface Definitions, Issue 7 (IEEE Std. 1003.1-2008)
 	</link>
       </title>

libstdc++-v3/doc/xml/manual/messages.xml

@@ -488,7 +488,7 @@ void test01()
   <biblioentry>
       <title>
 	<link xmlns:xlink="http://www.w3.org/1999/xlink"
-	      xlink:href="http://pubs.opengroup.org/onlinepubs/9699919799/">
+	      xlink:href="https://pubs.opengroup.org/onlinepubs/9699919799/">
       System Interface Definitions, Issue 7 (IEEE Std. 1003.1-2008)
 	</link>
       </title>