update README to mention new Windows Terminal app and UTF-8 support

README.txt

@@ -1057,6 +1057,24 @@ d3d11).*
 The executable uxplay.exe can also be run without the MSYS2 environment,
 in the Windows Terminal, with `C:\msys64\ucrt64\bin\uxplay`.
 
+There is a new modernized Windows Terminal application available from
+Microsoft that provides various terminals, and can be customized to also
+provide the MSYS2 terminals. See https://www.msys2.org/docs/terminals/
+(to make those instructions clearer: in the dropdown "Settings" menu,
+there is a second "settings" icon in the lower left corner: click on
+that to edit the settings.json file as described).
+
+The server name (-n `<name>`{=html} option) can be given in
+internationalized UTF-8 encoding: To enter UTF-8 characters in the MSYS2
+or other Windows terminals, use the numerical keypad with "Num Lock" on:
+while holding down the "Alt" key, type "+" on the keypad, followed by
+the UTF-8 hex code for the character (using the keypad for numbers),
+then release the "Alt" key. (The UTF-8 hex codes have 4 hex digits: for
+example, the "copyright" symbol has hex code 00a9.) This method must be
+activated in the Windows Registry: using regedit, find the Registry
+section 'HKEY_Current_User/Control Panel/Input Method", and add a new
+Key "EnableHexNumpad" with value "1", then reboot the computer.
+
 # Usage
 
 Options:
@@ -1926,7 +1944,7 @@ file specified). (D-Bus based) option -scrsv `<n>`{=html} to inhibit
 screensaver while UxPlay is running (Linux/\*BSD only). Add support for
 Service Discovery using a Bluetooth LE beacon. Add -vrtp option for
 forwarding decrypted h264/5 video to an external renderer (e.g., OBS
-Studio)
+Studio). Check that option input strings have valid UTF-8 encoding.
 
 1.72.2 2025-07-07 Fix bug (typo) in DNS_SD advertisement introduced with
 -pw option. Update llhttp to v 9.3.0