(cherry picked from commit 937bd5bd40b5a3ba181e680b397b7b5fbfb30b1d)

(cherry picked from commit 0d6c75c7e437d55af5ce36dbcf31289bb74eb54a)

- add automaxproc
- add recover from panic

(cherry picked from commit a442ee531bce1e2a51ecf6c367a09b14468448ec)

(cherry picked from commit 9e871765ded15eba45fa55ae4ab1454bd77718a1)

(cherry picked from commit fcb5cb322113cb41175d0672814b2af1ef914da8)

(cherry picked from commit 8b354d1aa07cb9240eb9722009c6576a400638b8)

(cherry picked from commit c91125745ceca1652d78b3ec1a50bc805d95ac76)

(cherry picked from commit f1d1aa650bd383e9db714199911d49cc4198b499)

(cherry picked from commit 743b88607c8f07ef6418df9a97295fed19fb4eef)

(cherry picked from commit 5ec6ec222ddc633fb427c17b098717252c0bcd4f)

(cherry picked from commit fd63f7039e937fdfd3f8bb71d02575e3fd7c0b4a)

(cherry picked from commit a43d56b5af18c08ca642fe4b6af6515a7d106a64)

(cherry picked from commit 2357b4cac538e7c30565ea885045a14afbda83fe)

(cherry picked from commit 7cb6b7c7d43acc638c551a1b87e31ebaa70f27fc)

The tc-mirred action won't clear skb->dst after redirection,which would
cause to the redirected packet being dropped in ip_rcv().
This bug is introduced into kernel by torvalds/linux@b57dc7c
and eventually be fixed by https://lore.kernel.org/all/[email protected]/.
So that we need to use the side-effect of tc-tunnel_key action to clear
skb->dst.