• Update net-p2p/bitcoin to 0.12.1.
• Enable DBUS option by default. Desktop systems almost always have DBus installed.
• Enable UPNP option by default. Many ISP supplied modems contain a NAT these days.
• Remove --disable-reduce-exports. It's disabled by default.
• Add bitcoind rc.d script. [1]

PR: 208937, 209136
Submitted by: xenophon+fbsdports@irtnog.org [1]
Approved by: robbak@gmail.com (maintainer)