"When bindv6only is 0, I believe that tells the system to use bind to open a "dual-stack" socket if you will"
should read:
"When bindv6only is 0, I believe that tells the system to bind to a "dual-stack" socket if you will...."
"When bindv6only is 0, I believe that tells the system to use bind to open a "dual-stack" socket if you will"
should read:
"When bindv6only is 0, I believe that tells the system to bind to a "dual-stack" socket if you will...."