Merge bitcoin/bitcoin#32727: doc: add release notes for #32425

b9a2e8e doc: add release notes for bitcoin/bitcoin#32425 (Vasil Dimov)

Pull request description:

  Add release notes for bitcoin/bitcoin#32425.

ACKs for top commit:
  pablomartin4btc:
    re-ACK b9a2e8e
  janb84:
    reACK b9a2e8e
  glozow:
    ACK b9a2e8e, thanks for taking suggestions!

Tree-SHA512: 617612504977007909fde921e7e40286bcf81310f9cf3996783d6148219906784e9749d67f7a9a13305d7788208143e5f6ecceafbc6790f52dd08ffd9f91944c

Author: glozow

doc/release-notes-32425.md

@@ -0,0 +1,14 @@
+Updated settings
+----------------
+
+- Previously, `-proxy` specified the proxy for all networks (except I2P which
+  uses `-i2psam`) and only the Tor proxy could have been specified separately
+  via `-onion`. Now, the syntax of `-proxy` has been extended and it is possible
+  to specify separately the proxy for IPv4, IPv6, Tor and CJDNS by appending `=`
+  followed by the network name, for example `-proxy=127.0.0.1:5555=ipv6`
+  configures a proxy only for IPv6. The `-proxy` option can be used multiple
+  times to define different proxies for different networks, such as
+  `-proxy=127.0.0.1:4444=ipv4 -proxy=10.0.0.1:6666=ipv6`. Later settings
+  override earlier ones for the same network; this can be used to remove an
+  earlier all-networks proxy and use direct connections only for a given
+  network, for example `-proxy=127.0.0.1:5555 -proxy=0=cjdns`. (#32425)