Add comment about DFM upload rates

auto_rx/station.cfg.example

@@ -200,6 +200,9 @@ sondehub_enabled = True
 # How often to push data to the SondeHub Database. (seconds)
 # All received positions are cached and uploaded every X seconds. 
 # Uploads are gzip compressed, so don't require much data transfer.
+# Users receiving Graw DFM sondes may want to set this to 30 to improve
+# the chances of uploads not being rejected by our Z-check.
+# (Refer: https://github.com/projecthorus/sondehub-infra/wiki/DFM-radiosonde-above-1000-and-not-enough-data-to-perform-z-check )
 sondehub_upload_rate = 15
 
 # An optional contact e-mail address.

auto_rx/station.cfg.example.network

@@ -201,6 +201,9 @@ sondehub_enabled = True
 # How often to push data to the SondeHub Database. (seconds)
 # All received positions are cached and uploaded every X seconds. 
 # Uploads are gzip compressed, so don't require much data transfer.
+# Users receiving Graw DFM sondes may want to set this to 30 to improve
+# the chances of uploads not being rejected by our Z-check.
+# (Refer: https://github.com/projecthorus/sondehub-infra/wiki/DFM-radiosonde-above-1000-and-not-enough-data-to-perform-z-check )
 sondehub_upload_rate = 15
 
 # An optional contact e-mail address.