https://github.com/curl/curl/commit/f7cac7cc07a45481b246c875e8113d741ba2a6e1
From: Daniel Stenberg <daniel@haxx.se>
Date: Sun, 14 Sep 2025 23:28:03 +0200
Subject: [PATCH] setopt: accept *_SSL_VERIFYHOST set to 2L

... without outputing a verbose message about it. In the early days we
had 2L and 1L have different functionalities.

Reported-by: Jicea
Bug: https://curl.se/mail/lib-2025-09/0031.html
Closes #18547
--- a/lib/setopt.c
+++ b/lib/setopt.c
@@ -443,6 +443,7 @@ static CURLcode setopt_bool(struct Curl_easy *data, CURLoption option,
                             long arg, bool *set)
 {
   bool enabled = !!arg;
+  int ok = 1;
   struct UserDefined *s = &data->set;
   switch(option) {
   case CURLOPT_FORBID_REUSE:
@@ -619,7 +620,7 @@ static CURLcode setopt_bool(struct Curl_easy *data, CURLoption option,
      * Enable verification of the hostname in the peer certificate for proxy
      */
     s->proxy_ssl.primary.verifyhost = enabled;
-
+    ok = 2;
     /* Update the current connection proxy_ssl_config. */
     Curl_ssl_conn_config_update(data, TRUE);
     break;
@@ -723,6 +724,7 @@ static CURLcode setopt_bool(struct Curl_easy *data, CURLoption option,
      * Enable verification of the hostname in the peer certificate for DoH
      */
     s->doh_verifyhost = enabled;
+    ok = 2;
     break;
   case CURLOPT_DOH_SSL_VERIFYSTATUS:
     /*
@@ -732,6 +734,7 @@ static CURLcode setopt_bool(struct Curl_easy *data, CURLoption option,
       return CURLE_NOT_BUILT_IN;
 
     s->doh_verifystatus = enabled;
+    ok = 2;
     break;
 #endif /* ! CURL_DISABLE_DOH */
   case CURLOPT_SSL_VERIFYHOST:
@@ -743,6 +746,7 @@ static CURLcode setopt_bool(struct Curl_easy *data, CURLoption option,
        this argument took a boolean when it was not and misused it.
        Treat 1 and 2 the same */
     s->ssl.primary.verifyhost = enabled;
+    ok = 2;
 
     /* Update the current connection ssl_config. */
     Curl_ssl_conn_config_update(data, FALSE);
@@ -844,7 +848,7 @@ static CURLcode setopt_bool(struct Curl_easy *data, CURLoption option,
   default:
     return CURLE_OK;
   }
-  if((arg > 1) || (arg < 0))
+  if((arg > ok) || (arg < 0))
     /* reserve other values for future use */
     infof(data, "boolean setopt(%d) got unsupported argument %ld,"
           " treated as %d", option, arg, enabled);