gethostbyname and ipv6 question

[Mark]

I'm writing code to perform a DNS look up of a server name using
gethostbyname. The call returns a HOSTENT structure. That structure
has a hard coded family of 2, and a hard coded host address length of
4.

If I'm reading the documentation correctly, it means that this
interface call will return only IPv4 addresses, and I need not worry
myself with any IPv6 issues.

One - Is this true? Am I understanding this correctly?

Two - if true, then is there any rumours about when IPv6 will be
supported through this call?

Three - If I make a bunch of these calls, won't I be fragmenting core
until my task ends? Does anyone try to clean this up rather than
relying on zOS to clean this up?

thanks,
MarkV