In pmap_set(), make sure to use correct version of INADDR_ANY address depending
on protocol family.

In pamp_set() the following code fragment conjures up an INADDR_ANY address to pass
down to uaddr2taddr() :

snprintf(buf, sizeof buf, "0.0.0.0.%d.%d",
     (((u_int32_t)port) >> 8) & 0xff, port & 0xff);

However, "0.0.0.0" is an invalid address for INET6 protocol family.
This patch fixes this by using "::" for ipv6 version of INADDR_ANY.

Signed-off-by: Sachin Bhamare <sbhamare@panasas.com>