net-analyzer/nepenthes depends on the library unconditionally, so
the package.use.mask was not enough.
# Jeroen Roovers <jer@gentoo.org> (20 Jun 2014)
# net-libs/adns is going away (bug #513982)
-app-admin/apachetop adns
-dev-libs/liboop adns
-net-analyzer/nepenthes adns
net-analyzer/wireshark libadns
# Zac Medico <zmedico@gentoo.org> (06 Jun 2014)
#--- END OF EXAMPLES ---
-# Michał Górny <mgorny@gentoo.org> (14 Aug 2015)
-# net-libs/adns never had any Gentoo maintainer. Mostly dead upstream
-# since 2006 (short activity in 2014). Does not respect nsswitch.conf or
-# /etc/hosts. The current version does not support IPv6. net-dns/c-ares
-# is a suggested replacement. Removal in 30 days.
-# net-libs/adns: bug #513238
-# dev-python/adns-python: bug #513994
-dev-python/adns-python
-net-libs/adns
-
# Patrice Clement <monsieurp@gentoo.org> (14 Aug 2015)
# Unreachable HOMEPAGE (dead). Very very very old package:
# last release came out in 2001.