mod_blocklist: Drop blocked messages without error, option to restore compliant behavior
From XEP-0191:
> For message stanzas, the server SHOULD return an error, which SHOULD
> be <service-unavailable/>.
Following this may leak to a blocked JID that they have been blocked,
which seems contrary to the goal of pretending to be perpetually
offline.
root = true
[*]
end_of_line = lf
indent_style = tab
insert_final_newline = true
trim_trailing_whitespace = true
[CHANGES]
indent_size = 4
indent_style = space
[configure]
indent_size = 3
indent_style = space
[**.xml]
indent_size = 2
indent_style = space