optional_depends "libevent"   "--with-libevent" "--without-libevent" "for event notification support"
optional_depends "cyrus-sasl" "--enable-sasl"   "--disable-sasl"     "for Simple Authentication and Security Layer support"
optional_depends "libxslt"    "--enable-docs"   "--disable-docs"     "for document generation"
optional_depends "systemd"    ""                ""                   "for systemd style boot"
