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.
#!/usr/bin/env lua-any
-- Lua-Versions: 5.3 5.2 5.1
-- traceback to errors.err for vim -q
local path_sep = package.config:sub(1,1);
for line in io.lines() do
local src, err = line:match("%s*(%S+)(:%d+: .*)")
if src then
src = src:gsub("\\", path_sep);
local cut = src:match("/()core/")
or src:match("/()net/")
or src:match("/()util/")
or src:match("/()modules/")
or src:match("/()plugins/")
or src:match("/()prosody[ctl]*$")
if cut then
src = src:sub(cut);
end
src = src:gsub("^modules/", "plugins/")
io.write(src, err, "\n");
end
end