plugin XEP-0277: better resilience to broken items: - if `author` element can't be found, `publisher` attribute, then `IQ`'s `from` attributes are used as fallback to find author jid - fix categories (tags) parsing if `author` element is not found - remove items which have failed parsing from `mbGet` results (instead of using `None`).

[DEFAULT]
xmpp_domain = server1.test
email_server = sat.test
email_port = 8025
email_admins_list = admin@server1.test

[component file_sharing]
tls_certificate = /usr/share/sat/certificates/server1.test.pem
tls_private_key = /usr/share/sat/certificates/server1.test-key.pem
http_upload_public_facing_url = https://sat.test:8888