bin/named/named.conf.docbook and doc/misc/options still contains reference to "auto":

        dnssec-lookaside ( <replaceable>string</replaceable> trust-anchor
            <replaceable>string</replaceable> | auto | no );

Therefore it's also generated to ARM.

Please squash 2a9f0d694d438f2d8fa1b51ffe5e199b4566d17d into the previous commit(s) as appropriate.