SUNRPC: Ensure that the gssproxy client can start in a connected state

mainline inclusion
from mainline-v5.18-rc7
commit fd13359f
category: bugfix
bugzilla: https://gitee.com/src-openeuler/kernel/issues/I59RN0

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=fd13359f54ee854f00134abc6be32da94ec53dbf



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Ensure that the gssproxy client connects to the server from the gssproxy
daemon process context so that the AF_LOCAL socket connection is done
using the correct path and namespaces.

Fixes: 1d658336 ("SUNRPC: Add RPC based upcall mechanism for RPCGSS auth")
Cc: stable@vger.kernel.org
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>

conflict:
	net/sunrpc/clnt.c

Signed-off-by: Wang Hai <wanghai38@huawei.com>