doc: describe onlynet option in doc/tor.md

as per http://www.erisian.com.au/bitcoin-core-dev/log-2019-04-11.html#l-102.

Description adapted from https://github.com/bitcoin/bitcoin/blob/master/src/init.cpp#L429.

Also fixes a typo in doc/dependencies.md.

Github-Pull: #15792
Rebased-From: 140bbeec45

doc/dependencies.md

@@ -43,4 +43,4 @@ Some dependencies are not needed in all configurations. The following are some f
 * ZeroMQ is needed only with the `--with-zmq` option.
 
 #### Other
-* librsvg is only needed if you need to run `make deploy` on (cross-compliation to) macOS.
+* librsvg is only needed if you need to run `make deploy` on (cross-compilation to) macOS.

doc/tor.md

@@ -16,7 +16,7 @@ outgoing connections, but more is possible.
 
 	-onion=ip:port  Set the proxy server to use for Tor hidden services. You do not
 	                need to set this if it's the same as -proxy. You can use -noonion
-	                to explicitly disable access to hidden service.
+	                to explicitly disable access to hidden services.
 
 	-listen         When using -proxy, listening is disabled by default. If you want
 	                to run a hidden service (see next section), you'll need to enable
@@ -27,6 +27,11 @@ outgoing connections, but more is possible.
 	-seednode=X     SOCKS5. In Tor mode, such addresses can also be exchanged with
 	                other P2P nodes.
 
+	-onlynet=onion  Make outgoing connections only to .onion addresses. Incoming
+	                connections are not affected by this option. This option can be
+	                specified multiple times to allow multiple network types, e.g.
+	                ipv4, ipv6, or onion.
+
 In a typical situation, this suffices to run behind a Tor proxy:
 
 	./bitcoind -proxy=127.0.0.1:9050