Index: doc/xml/manual/using_exceptions.xml
===================================================================
--- doc/xml/manual/using_exceptions.xml	(revision 193072)
+++ doc/xml/manual/using_exceptions.xml	(working copy)
@@ -440,7 +440,7 @@
   <biblioentry>
       <title>
 	<link xmlns:xlink="http://www.w3.org/1999/xlink"
-	      xlink:href="http://www.opengroup.org/austin">
+	      xlink:href="http://www.opengroup.org/austin/">
 	System Interface Definitions, Issue 7 (IEEE Std. 1003.1-2008)
 	</link>
       </title>
Index: doc/xml/manual/policy_data_structures.xml
===================================================================
--- doc/xml/manual/policy_data_structures.xml	(revision 193072)
+++ doc/xml/manual/policy_data_structures.xml	(working copy)
@@ -5401,7 +5401,7 @@
     <biblioentry xml:id="biblio.brodal96priority">
       <title>
 	<link xmlns:xlink="http://www.w3.org/1999/xlink"
-	      xlink:href="http://portal.acm.org/citation.cfm?id=313883">
+	      xlink:href="https://dl.acm.org/citation.cfm?id=313883">
 	  Worst-case efficient priority queues
 	</link>
       </title>
@@ -6193,7 +6193,7 @@
     <biblioentry xml:id="biblio.mscom">
       <title>
 	<link xmlns:xlink="http://www.w3.org/1999/xlink"
-	      xlink:href="http://www.microsoft.com/com">
+	      xlink:href="https://www.microsoft.com/com/">
 	  COM: Component Model Object Technologies
 	</link>
       </title>
@@ -6337,7 +6337,7 @@
     <biblioentry xml:id="biblio.sgi_stl">
       <title>
 	<link xmlns:xlink="http://www.w3.org/1999/xlink"
-	      xlink:href="http://www.sgi.com/tech/stl">
+	      xlink:href="http://www.sgi.com/tech/stl/">
 	  Standard Template Library Programmer's Guide
 	</link>
       </title>
Index: doc/xml/manual/messages.xml
===================================================================
--- doc/xml/manual/messages.xml	(revision 193072)
+++ doc/xml/manual/messages.xml	(working copy)
@@ -492,7 +492,7 @@
   <biblioentry>
       <title>
 	<link xmlns:xlink="http://www.w3.org/1999/xlink"
-	      xlink:href="http://www.opengroup.org/austin">
+	      xlink:href="http://www.opengroup.org/austin/">
       System Interface Definitions, Issue 7 (IEEE Std. 1003.1-2008)
 	</link>
       </title>
@@ -559,7 +559,7 @@
   <biblioentry>
       <title>
 	<link xmlns:xlink="http://www.w3.org/1999/xlink"
-	      xlink:href="http://www.gnu.org/software/gettext">
+	      xlink:href="https://www.gnu.org/software/gettext/">
       GNU gettext tools, version 0.10.38, Native Language Support
       Library and Tools.
 	</link>
Index: doc/xml/manual/codecvt.xml
===================================================================
--- doc/xml/manual/codecvt.xml	(revision 193072)
+++ doc/xml/manual/codecvt.xml	(working copy)
@@ -588,7 +588,7 @@
   <biblioentry>
       <title>
 	<link xmlns:xlink="http://www.w3.org/1999/xlink"
-	      xlink:href="http://www.opengroup.org/austin">
+	      xlink:href="http://www.opengroup.org/austin/">
       System Interface Definitions, Issue 7 (IEEE Std. 1003.1-2008)
 	</link>
       </title>