add back the default setting values and fix #739 (#1093)

modules/setting/setting.go

@@ -326,6 +326,8 @@ var (
 			RunAtStart bool
 			Schedule   string
 		}{
+			Enabled:    true,
+			RunAtStart: false,
 			Schedule:   "@every 10m",
 		},
 		RepoHealthCheck: struct {
@@ -335,6 +337,8 @@ var (
 			Timeout    time.Duration
 			Args       []string `delim:" "`
 		}{
+			Enabled:    true,
+			RunAtStart: false,
 			Schedule:   "@every 24h",
 			Timeout:    60 * time.Second,
 			Args:       []string{},
@@ -344,6 +348,7 @@ var (
 			RunAtStart bool
 			Schedule   string
 		}{
+			Enabled:    true,
 			RunAtStart: true,
 			Schedule:   "@every 24h",
 		},
@@ -353,6 +358,7 @@ var (
 			Schedule   string
 			OlderThan  time.Duration
 		}{
+			Enabled:    true,
 			RunAtStart: true,
 			Schedule:   "@every 24h",
 			OlderThan:  24 * time.Hour,