mod_blocklist: Add option 'migrate_legacy_blocking' to disable migration from mod_privacy
Tiny performance improvement for new users by skipping this check. Most
servers should have gone trough the migration for all active users long
ago.
As a suitable first step of phasing out this code, we make it possible
to disable it first. Later it can be disabled by default, before finally
the code is deleted.
Structure of a stanza:
stanza {
--- properties ---
tags -- array of tags
--- static methods ---
iq(attrs) --
--- read-only methods ---
reply -- return new stanza with attributes of current stanza
child_with_name(string name) -- return the first child of the current tag with the matching name
--- write methods ---
tag(name, sttrs) -- create a new child of the current tag, and set the child as current
up() -- move to the parent of the current tag
text(string) -- append a new text node to the current tag
}