Fix localization of error message 715-123130

* As usual, Microsoft are completely unable to properly process UTF-8 content, even if
  the response from an Invoke-WebRequest query explicitly specifies "charset=utf-8".
* So, once again, we need to force PowerShell's hand to treat the content as UTF-8.
* Also improve the default error message if we can't get it from Microsoft.

Fido.ps1

@@ -1,5 +1,5 @@
 #
-# Fido v1.62 - ISO Downloader, for Microsoft Windows and UEFI Shell
+# Fido v1.63 - ISO Downloader, for Microsoft Windows and UEFI Shell
 # Copyright © 2019-2024 Pete Batard <[email protected]>
 # Command line support: Copyright © 2021 flx5
 # ConvertTo-ImageSource: Copyright © 2016 Chris Carter
@@ -516,16 +516,21 @@ function Get-Code-715-123130-Message
 			Write-Host Querying $url
 		}
 		$r = Invoke-WebRequest -UseBasicParsing -TimeoutSec $DefaultTimeout -MaximumRedirection 0 $url
+		# Microsoft's handling of UTF-8 content is soooooooo *UTTERLY BROKEN*!!!
+		$r = [System.Text.Encoding]::UTF8.GetString($r.RawContentStream.ToArray())
 		# PowerShell 7 forces us to parse the HTML ourselves
 		$r = $r -replace "`n" -replace "`r"
 		$pattern = '.*<input id="msg-01" type="hidden" value="(.*?)"/>.*'
 		$msg = [regex]::Match($r, $pattern).Groups[1].Value
-		$msg = $msg -replace "&lt;", "<" -replace "<[^>]+>" -replace "\s+", " " -replace "\?\?\?", "-"
-		if ($msg -eq $null) {
+		$msg = $msg -replace "&lt;", "<" -replace "<[^>]+>" -replace "\s+", " "
+		if (($msg -eq $null) -or !($msg -match "715-123130")) {
 			throw
 		}
 	} catch {
-		$msg  = "You are (temporarily) banned from using this Microsoft service. Please try againg later. Refer to message code 715-123130 and"
+		$msg  = "Your IP address has been banned by Microsoft for issuing too many ISO download requests or for "
+		$msg += "belonging to a region of the world where sanctions currently apply. Please try again later.`r`n"
+		$msg += "If you believe this ban to be in error, you can try contacting Microsoft by referring to "
+		$msg += "message code 715-123130 and session ID "
 	}
 	return $msg
 }
@@ -1068,8 +1073,8 @@ exit $ExitCode
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