Remove VNET macros as suggested by Gleb Smirnoff.
Remove VNET macros as suggested by Gleb Smirnoff.

deepak899/sctp-refimpl,xwhuang/sctp-refimpl,sctplab/sctp-refimpl,xwhuang/sctp-refimpl,deepak899/sctp-refimpl,deepak899/sctp-refimpl,xwhuang/sctp-refimpl,xwhuang/sctp-refimpl,sctplab/sctp-refimpl,sctplab/sctp-refimpl,sctplab/sctp-refimpl,xwhuang/sctp-refimpl,deepak899/sctp-refimpl,deepak899/sctp-refimpl,sctplab/sctp-refimpl,sctplab/sctp-refimpl,deepak899/sctp-refimpl,xwhuang/sctp-refimpl