KNOWN_BUGS: mention AppleIDN and WinIDN test problems

Closes #14176
Closes #14387

tests/FILEFORMAT.md

@@ -426,6 +426,7 @@ SKIPPED.
 Features testable here are:
 
 - `alt-svc`
+- `AppleIDN`
 - `bearssl`
 - `brotli`
 - `c-ares`
@@ -487,6 +488,7 @@ Features testable here are:
 - `verbose-strings`
 - `wakeup`
 - `win32`
+- `WinIDN`
 - `wolfssh`
 - `wolfssl`
 - `xattr`

tests/data/DISABLED

@@ -93,3 +93,10 @@
 %if bearssl
 313
 %endif
+%if AppleIDN
+1034
+1035
+%endif
+%if WinIDN
+165
+%endif

tests/runtests.pl

@@ -593,6 +593,12 @@ sub checksystemfeatures {
                 # nghttp2 supports h2c, hyper does not
                 $feature{"h2c"} = 1;
             }
+            if ($libcurl =~ /AppleIDN/) {
+                $feature{"AppleIDN"} = 1;
+            }
+            if ($libcurl =~ /WinIDN/) {
+                $feature{"WinIDN"} = 1;
+            }
             if ($libcurl =~ /libssh2/i) {
                 $feature{"libssh2"} = 1;
             }