[wip] mail/courier-authlib update

Hi,
I was going to update mail/courier-authlib but I found that, even the version
we have in tree, gives an error make lib-depends-check:

courier-authlib-0.68.0p5(mail/courier-authlib,-main):
Missing: z.5 (/usr/local/lib/libauthsqlite.so.0.0) (system lib)
Extra: iconv.6 idn.18 intl.6
WANTLIB += z

courier-authlib-mysql-0.68.0p3(mail/courier-authlib,-mysql):
Missing: iconv.6 from libiconv-1.14p3 (/usr/local/lib/libauthmysql.so.0.0)
Missing: mariadb.28 from mariadb-client-10.3.15v1 (/usr/local/lib/libauthmysql.so.0.0)
Extra: mysqlclient.28
WANTLIB += iconv mariadb

The second one depends on databases/mariadb update and it's easily fixable
but what about the first one ?
Should I remove gettext,-runtime and libidn from dependencies ? I am not sure this
is the way to go.
Cheers
Giovanni