From: Patrick McDermott <patrick.mcdermott@libiquity.com>
Subject: Fix undefined references with NO_OLD_TLS and NO_SESSION_CACHE

diff -Naur src.orig/lib/vtls/wolfssl.c src/lib/vtls/wolfssl.c
--- src.orig/lib/vtls/wolfssl.c	2021-01-03 03:05:41.990032879 -0500
+++ src/lib/vtls/wolfssl.c	2021-01-03 03:19:00.108983191 -0500
@@ -265,8 +265,12 @@
 #endif
     break;
   case CURL_SSLVERSION_TLSv1_1:
+#ifndef NO_OLD_TLS
     req_method = wolfTLSv1_1_client_method();
     use_sni(TRUE);
+#else
+    failf(data, "wolfSSL does not support TLS 1.1");
+#endif
     break;
   case CURL_SSLVERSION_TLSv1_2:
     req_method = wolfTLSv1_2_client_method();
@@ -500,6 +504,7 @@
   }
 #endif /* OPENSSL_EXTRA */
 
+#ifndef NO_SESSION_CACHE
   /* Check if there's a cached ID we can/should use here! */
   if(SSL_SET_OPTION(primary.sessionid)) {
     void *ssl_sessionid = NULL;
@@ -520,6 +525,7 @@
     }
     Curl_ssl_sessionid_unlock(conn);
   }
+#endif
 
   /* pass the raw socket into the SSL layer */
   if(!wolfSSL_set_fd(backend->handle, (int)sockfd)) {
@@ -759,6 +765,7 @@
 
   DEBUGASSERT(ssl_connect_3 == connssl->connecting_state);
 
+#ifndef NO_SESSION_CACHE
   if(SSL_SET_OPTION(primary.sessionid)) {
     bool incache;
     WOLFSSL_SESSION *our_ssl_sessionid;
@@ -788,6 +795,7 @@
     }
     Curl_ssl_sessionid_unlock(conn);
   }
+#endif
 
   connssl->connecting_state = ssl_connect_done;