TX power lower setting from the WUI is ignored

I noticed that lowering the value of TX Power field in IPFire/WLanAP does nothing, as the value applied remains always the default. I searched bugzilla to see if this is a known issue and I found this bug report from @ms that seems to indicate this feature is not available in IPFire 2.X. but it is planned for 3.X

Since I do not require a higher transmission power, I did set it manually:

iwconfig blue0 txpower 12

as far as I can tell, it seems to work:

iwconfig blue0
blue0     IEEE 802.11  Mode:Master  Tx-Power=12 dBm   
          Retry short limit:7   RTS thr:off   Fragment thr:off
          Power Management:on

Edit: to make it survive a reboot I inserted the command in /etc/sysconfig/rc.local . Should be this properly documented in the wiki?

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