docs: update the docs in according with the new code

Suggested-by: @rustyrussell 

Signed-off-by: Vincenzo Palazzo <vincenzopalazzodev@gmail.com>

doc/lightning-connect.7.md

@@ -18,7 +18,11 @@ be of the form *id@host* or *id@host:port*. In this case, the *host* and
 
 *host* is the peer's hostname or IP address.
 
-If not specified, the *port* defaults to 9735.
+If not specified, the *port* depends on the current network:
+- bitcoin **mainnet**: 9735.
+- bitcoin **testnet**: 19735.
+- bitcoin **signet**: 39735.
+- bitcoin **regtest**: 19846.
 
 If *host* is not specified (or doesn't work), the connection will be attempted to an IP
 belonging to *id* obtained through gossip with other already connected

doc/lightningd-config.5.md

@@ -370,7 +370,8 @@ network.
 Note that for simple setups, the implicit *autolisten* option does the
 right thing: for the mainnet (bitcoin) network it will try to bind to
 port 9735 on IPv4 and IPv6, and will announce it to peers if it seems
-like a public address.
+like a public address (and other default ports for other networks,
+as described below).
 
 Core Lightning also support IPv4/6 address discovery behind NAT routers.
 If your node detects an new public address, it will update its announcement.