Implement mirror.success_exit_codes and global.dangerous_global_success_exit_codes

Signed-off-by: Harry Chen <i@harrychen.xyz>

worker/config.go

@@ -63,6 +63,9 @@ type globalConfig struct {
 
 	ExecOnSuccess []string `toml:"exec_on_success"`
 	ExecOnFailure []string `toml:"exec_on_failure"`
+
+	// merged with mirror-specific options. make sure you know what you are doing!
+	SuccessExitCodes []int `toml:"dangerous_global_success_exit_codes"`
 }
 
 type managerConfig struct {
@@ -169,6 +172,9 @@ type mirrorConfig struct {
 	ExecOnSuccessExtra []string `toml:"exec_on_success_extra"`
 	ExecOnFailureExtra []string `toml:"exec_on_failure_extra"`
 
+	// will be merged with global option
+	SuccessExitCodes []int `toml:"success_exit_codes"`
+
 	Command           string   `toml:"command"`
 	FailOnMatch       string   `toml:"fail_on_match"`
 	SizePattern       string   `toml:"size_pattern"`