xymon-4.3.7: duration reset when multiple acknowledgements 🔗 link

Hi,

Best wishes for 2012 to all !

We noticed that the duration selector will always be reset to min(s) 
when acking multiple lines in acknowledge.cgi. 			
   	  			  	
Acknowledging each line separately works: hour(s) or day(s) selections 
will be computed correctly.

Dominique