Merge branch '4.4'

NOTICE

@@ -29,6 +29,7 @@ Chris Deering
 Christoph Fiehe
 Craig Hesling
 Damian Minkov
+Dan Caseley
 Daniele Ricci
 Daniel Henninger
 Daniel Hintze
@@ -44,6 +45,7 @@ Fernando Ramirez
 Florian Kimmann
 Florian Schmaus
 Francisco Vives
+Frank Matheron
 Gaston Dombiak
 Georg Lukas
 Gilles Cornu
@@ -64,6 +66,7 @@ Jay Kline
 Jeff Williams
 Jesus Fuentes
 John Haubrich
+Jonathan Lennox
 Júlio Cesar Bueno Cotta
 Lars Noschinski
 Luca Stucchi
@@ -82,6 +85,7 @@ Pete Matern
 Piotr Nosek
 Rajat Kumar Gupta
 Robin Collier
+Simon Abykov
 Simon Schuster
 Son Goku
 Tairs Rzajevs

smack-bosh/src/main/java/org/jivesoftware/smack/bosh/XMPPBOSHConnection.java

@@ -203,7 +203,8 @@ public class XMPPBOSHConnection extends AbstractXMPPConnection {
         }
 
         try {
-            XmlPullParser parser = PacketParserUtils.getParserFor("<stream:stream xmlns='jabber:client'/>");
+            XmlPullParser parser = PacketParserUtils.getParserFor(
+                            "<stream:stream xmlns='jabber:client' xmlns:stream='http://etherx.jabber.org/streams'/>");
             onStreamOpen(parser);
         } catch (XmlPullParserException | IOException e) {
             throw new AssertionError("Failed to setup stream environment", e);

smack-core/src/main/java/org/jivesoftware/smack/packet/StanzaBuilder.java

@@ -184,6 +184,19 @@ public abstract class StanzaBuilder<B extends StanzaBuilder<B>> implements Stanz
         return getThis();
     }
 
+    public final B removeExtension(String elementName, String namespace) {
+        QName key = new QName(namespace, elementName);
+        extensionElements.remove(key);
+        return getThis();
+    }
+
+    public final B removeExtension(ExtensionElement extension) {
+        QName key = extension.getQName();
+        List<XmlElement> list = extensionElements.getAll(key);
+        list.remove(extension);
+        return getThis();
+    }
+
     public abstract Stanza build();
 
     public abstract B getThis();