Fix mbuf leakages and remove unneccessary duplicate mbuf frees. Use the right copy of an mbuf for the IP6_EXTHDR_CHECK.
Fix mbuf leakages and remove unneccessary duplicate mbuf frees.
Use the right copy of an mbuf for the IP6_EXTHDR_CHECK.

Reported by:	zec, hrs
Approved by:	bz (mentor)

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