Rename Ports to Unencrypted ports

This makes it clear that these ports are specified to connect without
TLS, and hopefully lead to people using TLS ports instead by default.

doc/user.rst

@@ -444,7 +444,8 @@ server.  The provided configuration form contains these fields:
   successful. It can for example be used to identify yourself using
   NickServ, with a command like this: `PRIVMSG NickServ :identify
   PASSWORD`.
-- **Ports**: The list of TCP ports to use when connecting to this IRC server.
+- **Unencrypted ports**: The list of TCP ports to use when connecting to
+  this IRC server.
   This list will be tried in sequence, until the connection succeeds for
   one of them. The connection made on these ports will not use TLS, the
   communication will be insecure. The default list contains 6697 and 6670.

src/xmpp/biboumi_adhoc_commands.cpp

@@ -266,7 +266,7 @@ void ConfigureIrcServerStep1(XmppComponent&, AdhocSession& session, XmlNode& com
     XmlSubNode ports(x, "field");
     ports["var"] = "ports";
     ports["type"] = "text-multi";
-    ports["label"] = "Ports";
+    ports["label"] = "Unencrypted ports";
     set_desc(ports, "List of ports to try, without TLS. Defaults: 6667.");
     for (const auto& val: utils::split(options.col<Database::Ports>(), ';', false))
       {