Issues

Make the last known user state available when offline

Error IQs should be able to carry one extension element besides the error element

Exceptions in async tasks should not go uncaught to the call stack to avoid program termination

XHTMLText.appendOpenBodyTag() produces invalid XML

Extend HttpFileUploadManager by methods with InputStream parameter

MultiUserChat enter() should reset the timeout of the collector waiting for the final self presence to prevent timeouts for large MUCs

Smack fails under JDK 11 because com.sun.jndi.dns.DnsContextFactory is not inaccessible

XMPPTCPConnection sometimes has two writer threads running

Message.getBody() should not return `null` if all bodies have an xml:lang

DeliveryReceiptManager should not send receipts with messages of type 'groupchat'

Make MultiUserChat.leave() wait for response

Make TCP socket connection attempt interruptable

XMPPTCPConnection does not wait for stream features after authentication if compression is disabled

Ensure that IQ response 'to' address and ID are set correctly

Check if bounded unacknowledged stanzas queue is full before adding to it to avoid IllegalStateException

FormField.getFirstValue() throws IndexOutOfBoundsException if there are no values

XMLUtil.prettyFormatXml() throws on some Android devices

XEP-0384 (OMEMO): Exceptions in OmemoService.fetchDeviceList not properly handled

Add support for XEP-0221: Data Forms Media Element

Add support for MUC CAPTCHA challenges on join (XEP-0158 § 5.)

DNSUtil.setDaneProvider() does not set the DANE provider

ConcurrentModification Exception in MultiUserChatManager.java

SimplePayload should infer the XML element name and namespace

XEP-0184: DeliveryReceipt requires ID, although the XEP defines it as optional attribute