STORE 'file' scheme loader: DNS name in URI is case insensitive

...  so compare accordingly with "//localhost"
Reviewed-by: NBernd Edlinger <bernd.edlinger@hotmail.de>
(Merged from https://github.com/openssl/openssl/pull/3827)

crypto/store/loader_file.c

@@ -677,7 +677,7 @@ static OSSL_STORE_LOADER_CTX *file_open(const OSSL_STORE_LOADER *loader,
     const char *path = NULL;
 
     if (strncasecmp(uri, "file:", 5) == 0) {
-        if (strncmp(&uri[5], "//localhost/", 12) == 0) {
+        if (strncasecmp(&uri[5], "//localhost/", 12) == 0) {
             path = &uri[16];
         } else if (strncmp(&uri[5], "///", 3) == 0) {
             path = &uri[7];