The following two features would be nice to see: 1) That one my specify service names instead of the numbers for hkp_port and recon_port. You can use getservent(3) to query the system's service DB (e.g. /etc/services)
2) The same for hostnames for hkp_address and recon_address It's often helpful if one can simply define an alias in /etc/hosts and services determine the addresses they should bind to from that. The advantage is that when the IP changes, you don't have to go through all the services configurations, but simplty change it at one place. gethostent(3) is your friend.