Do not exit with error in the linkchecker script if all warnings are ignored.

ChangeLog.txt

@@ -22,6 +22,10 @@ Changes:
   Closes: SF bug #2579899
 - logging: Make output more concise by not logging duplicate cached URLs.
 - nntp: Only retry 3 instead of 5 times to connect to busy NNTP servers.
+- cmdline: The command line script exits with error only when errors
+  or warnings are printed. Previously it exited with error status even
+  when all warnings were ignored.
+  Closes: SF bug #2820812
 
 Features:
 - email: Added email syntax checking.

linkchecker

@@ -810,7 +810,7 @@ else:
 if config['interactive']:
     raw_input(_("Hit RETURN to finish"))
 
-# if errors or warnings are encountered, exit with non-zero status
-if config['logger'].errors or \
-  (config['logger'].warnings and config['warnings']):
+# if printed errors or warnings are encountered, exit with non-zero status
+if config['logger'].errors_printed or \
+  (config['logger'].warnings_printed and config['warnings']):
     sys.exit(1)