Add some debug printfs for User-Agent.

Author: michaelrsweet

cups/http.c

@@ -3700,9 +3700,15 @@ http_send(http_t       *http,		// I - HTTP connection
   if (!http->fields[HTTP_FIELD_USER_AGENT])
   {
     if (http->default_fields[HTTP_FIELD_USER_AGENT])
+    {
+      DEBUG_puts("5http_send: Using default User-Agent.");
       httpSetField(http, HTTP_FIELD_USER_AGENT, http->default_fields[HTTP_FIELD_USER_AGENT]);
+    }
     else
+    {
+      DEBUG_puts("5http_send: Using client.conf User-Agent.");
       httpSetField(http, HTTP_FIELD_USER_AGENT, cupsGetUserAgent());
+    }
   }
 
   // Set the Accept-Encoding field if it isn't already...
@@ -3743,7 +3749,7 @@ http_send(http_t       *http,		// I - HTTP connection
   if (http->encryption == HTTP_ENCRYPTION_REQUIRED && !http->tls)
   {
     httpSetField(http, HTTP_FIELD_CONNECTION, "Upgrade");
-    httpSetField(http, HTTP_FIELD_UPGRADE, "TLS/1.2,TLS/1.1,TLS/1.0");
+    httpSetField(http, HTTP_FIELD_UPGRADE, "TLS/1.3,TLS/1.2,TLS/1.1,TLS/1.0");
   }
 
   if (httpPrintf(http, "%s %s HTTP/1.1\r\n", codes[request], buf) < 1)

cups/usersys.c

@@ -459,12 +459,17 @@ cupsSetUserAgent(const char *user_agent)// I - User-Agent string or `NULL`
 #endif // _WIN32
 
 
+  DEBUG_printf("cupsSetUserAgent(\"%s\")", user_agent);
+
   if (user_agent)
   {
     cupsCopyString(cg->user_agent, user_agent, sizeof(cg->user_agent));
+    DEBUG_printf("1cupsSetUserAgent: user_agent=\"%s\"", cg->user_agent);
     return;
   }
 
+  DEBUG_printf("1cupsSetUserAgent: uatokens=%d(%s)", cg->uatokens, uatokens[cg->uatokens]);
+
   if (cg->uatokens < _CUPS_UATOKENS_OS)
   {
     switch (cg->uatokens)
@@ -487,6 +492,7 @@ cupsSetUserAgent(const char *user_agent)// I - User-Agent string or `NULL`
 	  break;
     }
 
+    DEBUG_printf("1cupsSetUserAgent: user_agent=\"%s\"", cg->user_agent);
     return;
   }
 
@@ -568,6 +574,8 @@ cupsSetUserAgent(const char *user_agent)// I - User-Agent string or `NULL`
   else
     snprintf(cg->user_agent, sizeof(cg->user_agent), "CUPS/" LIBCUPS_VERSION " (%s %s; %s) IPP/2.0", name.sysname, name.release, name.machine);
 #endif // _WIN32
+
+  DEBUG_printf("1cupsSetUserAgent: user_agent=\"%s\"", cg->user_agent);
 }
 
 
@@ -606,6 +614,8 @@ cupsGetUserAgent(void)
   if (!cg->user_agent[0])
     cupsSetUserAgent(NULL);
 
+  DEBUG_printf("1cupsGetUserAgent: Returning \"%s\".", cg->user_agent);
+
   return (cg->user_agent);
 }