Fix ipv6 packet processing path that could trigger a kernel panic

Fix a overflow when checking TCP header in IPv6 packet

Call freePacket() after checking

Fixed a potential kernel panic when calculating ICMPv6 packet checksum.

bump version

Fixing Jumbo Frames may result in the loss of the latter part.

Fixing the modification of network card parameters may cause kernel panic.
Correcting some atomic operations.

Enable medium selection but do nothing to make macOS happy.

first commit