Operates in three modes:
# List deleted revisions for the given titles, sorted by timestamp.
# List deleted contributions for the given user, sorted by timestamp (no titles specified).
# List all deleted revisions in the given namespace, sorted by title and timestamp (no titles specified, $1user not set).
Certain parameters only apply to some modes and are ignored in others.
Protocol of the URL. If empty and <var>$1query</var> is set, the protocol is <kbd>http</kbd> and <kbd>https</kbd>. Leave both this and <var>$1query</var> empty to list all external links.