slixmpp refusing to cache disco#info with duplicate items
Some clients populate their disco#info with duplicates. Slixmpp will query those but refuse to 0115-cache the record becuse of the duplicates:
2018-12-16 19:51:23,015 DEBUG:caps:Duplicate disco features found, invalid for caps
This is a "feature" that's in the code since the introduction of the XEP-0115 plugin: 8a29ec67
I haven't found anything in XEP-0030 or XEP-0115 mandating this refusal, so please make slixmpp (and by extensions poezio) cache those records as well.