zmq: point API link to 4.0 as that is what we are conforming to [Trivial]

Signed-off-by: Johnathan Corgan <johnathan@corganlabs.com>
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Johnathan Corgan 2015-10-12 13:39:47 -07:00
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@ -78,7 +78,7 @@ bytes).
These options can also be provided in bitcoin.conf.
ZeroMQ endpoint specifiers for TCP (and others) are documented in the
[ZeroMQ API](http://api.zeromq.org).
[ZeroMQ API](http://api.zeromq.org/4-0:_start).
Client side, then, the ZeroMQ subscriber socket must have the
ZMQ_SUBSCRIBE option set to one or either of these prefixes (for