Add charset information as used by FreeBSD.

dlls/kernel/locale.c

@@ -93,6 +93,19 @@ static const struct charset_entry
     { "ISO-8859-7", 28597 },
     { "ISO-8859-8", 28598 },
     { "ISO-8859-9", 28599 },
+    { "ISO_8859-1", 28591 },
+    { "ISO_8859-10", 28600 },
+    { "ISO_8859-13", 28603 },
+    { "ISO_8859-14", 28604 },
+    { "ISO_8859-15", 28605 },
+    { "ISO_8859-2", 28592 },
+    { "ISO_8859-3", 28593 },
+    { "ISO_8859-4", 28594 },
+    { "ISO_8859-5", 28595 },
+    { "ISO_8859-6", 28596 },
+    { "ISO_8859-7", 28597 },
+    { "ISO_8859-8", 28598 },
+    { "ISO_8859-9", 28599 },
     { "KOI8-R", 20866 },
     { "KOI8-U", 20866 },
     { "UTF-8", CP_UTF8 }