modified hloeung's glibc test
fixed warning in net.c, fixed missing define of NSCOUNT in dns.c
Revert "fixed warning in net.c, fixed missing define of NSCOUNT in dns.c"

This reverts commit 9a2aa603a0251148602731c1ae2857f032d0bad0.
Revert "modified hloeung's glibc test"

This reverts commit ff22833854960be90648666e7fab22b6f9bdd616.
Revert "One more fix."

This reverts commit c02701de3bc91760b0f7af67a08d4b2189b6510f.
Revert "Make it more portable and also fixed dorequest() and dns_ack6() to include IPv6 nameservers."

This reverts commit 8e1bea50eee25c0ba8550254ad14fcba0614ed83.
Revert "Fixed to consider IPv6 nameservers and to also handle case where only IPv6 nameservers are specified."

This reverts commit f45352dcb7e92471edd0e69de950c30e78d00424.