remove ifdef checks on the flag RESOLVSORT #62
Description
Proposal: remove all ifdef checks if RESOLVSORT is defined, and assume it is never defined
This code is not compatible with ipv6 is enabled, so the ifdef is useless if we fix #61
if we want to make sure it is indeed not set we could have a check if it is not flagged in config.h instead of res_init.c
this removes unused and unmaintained code, because most of the servers are running with ipv6 enabled, and if they don't, they should