Disable HTTP/2 negotiation for trino-client/jdbc

When Trino cluster is exposed through the proxy/LB that supports HTTP/2,
OkHttp client can negotiate and use HTTP/2. Since we don't have support for HTTP/2
in the Trino itself, this lacks testing and therefore should be unsupported.

client/trino-client/src/main/java/io/trino/client/OkHttpUtil.java

@@ -15,6 +15,7 @@
 
 import com.google.common.base.CharMatcher;
 import com.google.common.base.StandardSystemProperty;
+import com.google.common.collect.ImmutableList;
 import com.google.common.net.HostAndPort;
 import io.trino.client.auth.kerberos.DelegatedConstrainedContextProvider;
 import io.trino.client.auth.kerberos.DelegatedUnconstrainedContextProvider;
@@ -25,6 +26,7 @@
 import okhttp3.Interceptor;
 import okhttp3.JavaNetCookieJar;
 import okhttp3.OkHttpClient;
+import okhttp3.Protocol;
 import okhttp3.internal.tls.LegacyHostnameVerifier;
 import org.ietf.jgss.GSSCredential;
 
@@ -111,6 +113,12 @@ public static void setupCookieJar(OkHttpClient.Builder clientBuilder)
         clientBuilder.cookieJar(new JavaNetCookieJar(new CookieManager()));
     }
 
+    public static void disableHttp2(OkHttpClient.Builder clientBuilder)
+    {
+        // Disable HTTP/2 as it's not tested nor supported
+        clientBuilder.protocols(ImmutableList.of(Protocol.HTTP_1_1, Protocol.HTTP_1_1));
+    }
+
     public static void setupSocksProxy(OkHttpClient.Builder clientBuilder, Optional<HostAndPort> socksProxy)
     {
         setupProxy(clientBuilder, socksProxy, SOCKS);

client/trino-client/src/main/java/io/trino/client/uri/TrinoUri.java

@@ -53,6 +53,7 @@
 import static com.google.common.collect.ImmutableMap.toImmutableMap;
 import static io.trino.client.KerberosUtil.defaultCredentialCachePath;
 import static io.trino.client.OkHttpUtil.basicAuth;
+import static io.trino.client.OkHttpUtil.disableHttp2;
 import static io.trino.client.OkHttpUtil.setupAlternateHostnameVerification;
 import static io.trino.client.OkHttpUtil.setupCookieJar;
 import static io.trino.client.OkHttpUtil.setupHttpProxy;
@@ -603,6 +604,7 @@ public void setupClient(OkHttpClient.Builder builder)
             throws SQLException
     {
         try {
+            disableHttp2(builder);
             setupCookieJar(builder);
             setupSocksProxy(builder, socksProxy);
             setupHttpProxy(builder, httpProxy);