9 - Rewritten more extensible MUC module
10 - Store inactive rooms to disk
11 - Store rooms to disk on shutdown
13 - Tombstones in place of destroyed rooms
19 - PEP now uses our pubsub code and now shares the above features
20 - Asynchronous operations
22 - mod\_muc\_mam (XEP-0313 in groupchats)
23 - mod\_vcard\_legacy (XEP-0398)
24 - mod\_vcard4 (XEP-0292)
25 - mod\_csi, mod\_csi\_simple (XEP-0352)
26 - New experimental network backend "epoll"
36 - Rewritten SQL storage module with Archive support
40 - Improved TLS configuration
42 - mod\_blocklist (XEP-0191)
43 - mod\_carbons (XEP-0280)
44 - Pluggable connection timeout handling
45 - mod\_websocket (RFC 7395)
51 - mod\_privacy (XEP-0016)
52 - mod\_compression (XEP-0138)