commit 79140c7033519cdbcc9d59f08425ddda0a79bff7
Author: dormando <dormando@rydia.net>
Date:   Mon Mar 23 14:40:34 2020 -0700

    tls: fix refresh_certs crash when disabled
    
    segfaults server if refresh_certs command is run with TLS compiled in
    but not enabled.

diff --git a/tls.c b/tls.c
index c440a7e..ae1cb4d 100644
--- a/tls.c
+++ b/tls.c
@@ -94,6 +94,11 @@ static bool load_server_certificates(char **errmsg) {
         *errmsg = NULL;
         return false;
     }
+    if (settings.ssl_ctx == NULL) {
+        snprintf(error_msg, errmax, "Error TLS not enabled\r\n");
+        *errmsg = error_msg;
+        return false;
+    }
     SSL_LOCK();
     if (!SSL_CTX_use_certificate_chain_file(settings.ssl_ctx,
         settings.ssl_chain_cert)) {