#2783 memory leak in solaris ipaddress module similar to bug #2760

[lijo]

The _load_v6 function in ipaddress_solaris.c has a similar leak to the following bug which has been already fixed.
https://sourceforge.net/p/net-snmp/bugs/2760/

The fix is similar and is attached.

[Niels Baggesen]

Thanks for the patch! It has been applied to the active branches.