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/I57MRF


CVE: NA

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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>

conflicts:
	include/linux/sunrpc/clnt.h
	net/sunrpc/clnt.c

Signed-off-by: Wang Hai <wanghai38@huawei.com>
Reviewed-by: Zhang Xiaoxu <zhangxiaoxu5@huawei.com>
Reviewed-by: Wei Yongjun <weiyongjun1@huawei.com>
Signed-off-by: Yongqiang Liu <liuyongqiang13@huawei.com>