Remove timestamps from program logs

- Using suppress-timestamps for openvpn
- Using custom regexp for tinyproxy, shadowsocks and unbound
- Time is now only shown once per line
- Log level of subprogram is preserverd

internal/mullvad/conf.go

@@ -65,6 +65,7 @@ func (c *configurator) BuildConf(connections []models.OpenVPNConnection, verbosi
 		"pull-filter ignore \"auth-token\"", // prevent auth failed loops
 		"auth-retry nointeract",
 		"remote-random",
+		"suppress-timestamps",
 
 		// Modified variables
 		fmt.Sprintf("verb %d", verbosity),