Don't use DefaultHttpHeaders(validateHeaders = false)

Not sure if this is an issue here as those are internal copies use shouldn't have access to, but you never know...

Author: slandelle

client/src/main/java/org/asynchttpclient/netty/handler/intercept/ProxyUnauthorized407Interceptor.java

@@ -79,7 +79,7 @@ public boolean exitAfterHandling407(Channel channel,
 
     // FIXME what's this???
     future.setChannelState(ChannelState.NEW);
-    HttpHeaders requestHeaders = new DefaultHttpHeaders(false).add(request.getHeaders());
+    HttpHeaders requestHeaders = new DefaultHttpHeaders().add(request.getHeaders());
 
     switch (proxyRealm.getScheme()) {
       case BASIC:

client/src/main/java/org/asynchttpclient/netty/handler/intercept/Unauthorized401Interceptor.java

@@ -77,7 +77,7 @@ public boolean exitAfterHandling401(final Channel channel,
 
     // FIXME what's this???
     future.setChannelState(ChannelState.NEW);
-    HttpHeaders requestHeaders = new DefaultHttpHeaders(false).add(request.getHeaders());
+    HttpHeaders requestHeaders = new DefaultHttpHeaders().add(request.getHeaders());
 
     switch (realm.getScheme()) {
       case BASIC:

client/src/main/java/org/asynchttpclient/netty/request/NettyRequestSender.java

@@ -437,7 +437,7 @@ public <T> void writeRequest(NettyResponseFuture<T> future, Channel channel) {
   }
 
   private void configureTransferAdapter(AsyncHandler<?> handler, HttpRequest httpRequest) {
-    HttpHeaders h = new DefaultHttpHeaders(false).set(httpRequest.headers());
+    HttpHeaders h = new DefaultHttpHeaders().set(httpRequest.headers());
     TransferCompletionHandler.class.cast(handler).headers(h);
   }