Clarify that S3 buckets must be created by the user.

Suggested by David Youatt.

doc/xml/release.xml

@@ -130,6 +130,14 @@
                      <release-item>
                          <p>List deprecated option names in documentation and command-line help.</p>
                      </release-item>
+
+                     <release-item>
+                        <release-item-contributor-list>
+                            <release-item-ideator id="youatt.david"/>
+                        </release-item-contributor-list>
+
+                         <p>Clarify that S3 buckets must be created by the user.</p>
+                     </release-item>
                  </release-improvement-list>
 
                 <release-development-list>
@@ -4184,5 +4192,10 @@
             <contributor-name-display>Javier Wilson</contributor-name-display>
             <contributor-id type="github">javierwilson</contributor-id>
         </contributor>
+
+        <contributor id="youatt.david">
+            <contributor-name-display>David Youatt</contributor-name-display>
+            <contributor-id type="github">youattd</contributor-id>
+        </contributor>
     </contributor-list>
 </doc>

doc/xml/user-guide.xml

@@ -1525,7 +1525,7 @@
     <section id="s3-support" depend="/quickstart/configure-archiving">
         <title>S3 Support</title>
 
-        <p><backrest/> supports storing repositories in <proper>Amazon S3</proper>.</p>
+        <p><backrest/> supports storing repositories in <proper>Amazon S3</proper>.  The bucket used to store the repository must be created in advance &amp;mdash; <backrest/> will not do it automatically.</p>
 
         <backrest-config host="{[host-pg-primary]}" show="n" file="{[backrest-config-demo]}">
             <title>Clear the cipher settings</title>