Monal 6.4.24 (Build 1102, PR #1749)

• Added DNSSEC bug warning
• Fixed spurious MUC join errors
• Fixed playback of received mp3 files
• Fixed vanishing toolbar buttons in active chats list
• Fixed sharing location from Google Maps
• Switched from iOS bundled libxml2 to new rust based xml parser to fix crashes
• Now only accepting Channel/Group invites from contacts approved to our contact list
• Fixed deeply nested xml DoS vector in push notification handler
• Fixed several crashes