refine method to get maximum number of file descriptors
refine method to get maximum number of file descriptors

gale320/flexisip,gale320/flexisip,BelledonneCommunications/flexisip,biddyweb/flexisip,BelledonneCommunications/flexisip,gale320/flexisip,BelledonneCommunications/flexisip,biddyweb/flexisip,biddyweb/flexisip,biddyweb/flexisip,gale320/flexisip,BelledonneCommunications/flexisip