Restore the -u option as a dummy.

Closes #890

NEWS

@@ -76,6 +76,7 @@ Changes since version 6.4:
     - Signature read command for ATmega165* was wrong (no-id)
     - Cannot use non-standard baud rates for uploading on MacOS #771
     - Wrong values in avrdude.conf #897
+    - AVR-Eclipse plugin broken by missing -u commandline option #890
 
   * Pull requests:
 

src/main.c

@@ -571,6 +571,11 @@ int main(int argc, char * argv [])
         terminal = 1;
         break;
 
+      case 'u':
+        avrdude_message(MSG_INFO, "%s: \"safemode\" feature no longer supported\n",
+                progname);
+        break;
+
       case 'U':
         upd = parse_op(optarg);
         if (upd == NULL) {