backend: new `server_jid` option: Server domain must be known to validate requests, this can be done explicitely by using the `server_jid` option. If this option is not set, the server domain is found: - by using the `from` name of the initial delegation advertising message - or it fallbacks to using the part after initial `.` (`pubsub.example.org` would give `example.org`)

b2149e448465d54e39bb8892ba9ded3313510738 idavoll-0.5.0
e289636ccc4f9e3690879aaf7b9bb5f2674c3fc8 idavoll-0.7.3
560b6cdc50b20d7590a70b0311d4781e3296c589 0.1.0
232002e132dbf9c7563d9f78f4b5e2bcdc2764de 0.1.1
642dffb9d6f1e7b2e7d5e9cb6ba17b6950fdf0bb 0.2.0
0861da6975b57dcaa1c69b2833232fe191346f87 0.3.0