[IPV6]: Do not ignore IPV6_MTU socket option.
[IPV6]: Do not ignore IPV6_MTU socket option.

Based on patch by Hoerdt Mickael <hoerdt@clarinet.u-strasbg.fr>.

Signed-off-by: YOSHIFUJI Hideaki <5480c5b52bedaa11aec5a7034a7be9f8db0840c7@linux-ipv6.org>
Signed-off-by: David S. Miller <fe08d3c717adf2ae63592e4c9aec6e3e404d8e3e@davemloft.net>

TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas