Man pages matching name apache2::authcookie in section 3pm:

Apache2::AuthCookie.3pm.en	debian 10 / libapache2-authcookie-perl
Apache2::AuthCookie.3pm.en	debian 11 / libapache2-authcookie-perl
Apache2::AuthCookie.3pm.en	debian 12 / libapache2-authcookie-perl