Config option to disable automatic repo watching (#5852)

Add a new config option to enable / disable the automatic watching of
repos for new repositories and if a user is added to a team.

Fixes #653

Signed-off-by: Sebastian Sauer <sauer.sebastian@gmail.com>

modules/setting/setting.go

@@ -1247,6 +1247,7 @@ var Service struct {
 	DefaultAllowOnlyContributorsToTrackTime bool
 	NoReplyAddress                          string
 	EnableUserHeatmap                       bool
+	AutoWatchNewRepos                       bool
 
 	// OpenID settings
 	EnableOpenIDSignIn bool
@@ -1281,6 +1282,7 @@ func newService() {
 	Service.DefaultAllowOnlyContributorsToTrackTime = sec.Key("DEFAULT_ALLOW_ONLY_CONTRIBUTORS_TO_TRACK_TIME").MustBool(true)
 	Service.NoReplyAddress = sec.Key("NO_REPLY_ADDRESS").MustString("noreply.example.org")
 	Service.EnableUserHeatmap = sec.Key("ENABLE_USER_HEATMAP").MustBool(true)
+	Service.AutoWatchNewRepos = sec.Key("AUTO_WATCH_NEW_REPOS").MustBool(true)
 
 	sec = Cfg.Section("openid")
 	Service.EnableOpenIDSignIn = sec.Key("ENABLE_OPENID_SIGNIN").MustBool(!InstallLock)