using_exceptions.xml: Move boost.orgs link to https.

	* doc/xml/manual/using_exceptions.xml: Move boost.orgs link to
	https.

From-SVN: r264515

libstdc++-v3/ChangeLog

+2018-09-23  Gerald Pfeifer  <gerald@pfeifer.com>
+
+	* doc/xml/manual/using_exceptions.xml: Move boost.orgs link to
+	https.
+
 2018-09-21  François Dumont  <fdumont@gcc.gnu.org>
 
 	PR libstdc++/87135

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

@@ -447,7 +447,7 @@ is called.
   <biblioentry>
       <title>
 	<link xmlns:xlink="http://www.w3.org/1999/xlink"
-	      xlink:href="http://www.boost.org/community/error_handling.html">
+	      xlink:href="https://www.boost.org/community/error_handling.html">
 	Error and Exception Handling
 	</link>
       </title>
@@ -464,7 +464,7 @@ is called.
   <biblioentry>
       <title>
 	<link xmlns:xlink="http://www.w3.org/1999/xlink"
-	      xlink:href="http://www.boost.org/community/exception_safety.html">
+	      xlink:href="https://www.boost.org/community/exception_safety.html">
 	Exception-Safety in Generic Components
 	</link>
       </title>