namecheap: Sorting nameservers (#72)
namecheap: Sorting nameservers (#72)

Partially fixes #69
whs/dnscontrol,mathieuherbert/dnscontrol,StackExchange/dnscontrol,rbelnap/dnscontrol,mathieuherbert/dnscontrol,rbelnap/dnscontrol,StackExchange/dnscontrol,whs/dnscontrol,StackExchange/dnscontrol