Add support for sys-libs/db (Berkeley DB for MySQL)

Packages describing “berkdb” as local USE flag

Package “berkdb” Flag Description
sys-apps/iproute2 build programs that use berkdb (just arpd)
mail-client/mutt Enable sys-libs/db database backend for header caching
sys-libs/pam Build the pam_userdb module, that allows to authenticate users against a Berkeley DB file. Please note that enabling this USE flag will create a PAM module that links to the Berkeley DB (as provided by sys-libs/db) installed in /usr/lib and will thus not work for boot-critical services authentication.
app-misc/gramps Support BerkeleyDB-based family trees produced by older versions of Gramps
mail-client/neomutt Enable BDB (Berkley DB) backend for header caching
sys-libs/gdbm enable compatibility layer for UNIX-like dbm and ndbm interfaces
gnome-extra/evolution-data-server sys-libs/db support needed to migrate old (pre-3.13 evolution versions) addressbook data

All packages providing a “berkdb” USE flag (40)