nfs4: Remove assertion against NFS4ERR_NOFILEHANDLE

According to the NFS4 specification NFS4ERR_NOFILEHANDLE is returned only
when the clients sends malformed request. FreeBSD nfsd implementation chooses
to ignore that fact and returns this error code also for correctly formed
requests that it can not service due to the restrictions in the server
configuration.

nfs4: Fix CID #1032257: ERR_DENIED is expected only when a cookie is given

nfs4: Fix CID #1032280: Prevent integer overflow

* Do not increase delay after tenth attempt
* Cast 1 to bigtime_t before shifting it left

nfs4: make sure retry delay won't get out of bigtime_t range

nfs4: silent "suggest parentheses" GCC warning

nfs4: fix incrementing owner sequence id in some cases

If in a compound request an error occurs before the operation that takes
sequence id is executed (e.g. OPEN or LOCK) do not increment sequence id
regardless of the error code.

nfs4: use exponential backoff when the server ask to wait

nfs4: Fix handling of retried CLOSE requests

nfs4: Fix typo: NFS4ERR_LOCKS_HELD instead of NFS4ERR_LOCK_HELD

nfs4: Add assertions for unexpected error codes

There are some NFS4 error codes we should not get if the client is operating
correctly.
CLID_INUSE may be caused only by incorrectly generated SETCLIENTID request.
NOFILEHANDLE, RESTOREFH and OP_ILLEGAL indicate that the client has sent
an incorrectly build request.
BAD_STATEID and BAD_SEQID indicate a bug in handling {open,lock}_owners.
LOCK_HELD happens when the client incorrectly cleans up after accessing a file.

nfs4: Add numerous assertion checks

nfs4: Fix node removal

nfs4: Make the client more configurable

nfs4: Check for semaphore creation errors in ConnectionBase classes

nfs4: Add node to inode to file handle map before notifying

nfs4: Make sure that request are properly sequenced

nfs4: Fix server reboot recovery

nfs4: Add basic support for extended attributes

nfs4: Reclaim delegations after server reboot

nfs4: Use one open state per inode

nfs4: Use global open owner, check whether delegation was granted

nfs4: NFS4Object::HandleErrors needs OpenState or OpenFileCookie object

nfs4: Do not open too much files on server

nfs4: Move low level NFS4 code to Inode's base class

nfs4: Remove assertion against NFS4ERR_NOFILEHANDLE

According to the NFS4 specification NFS4ERR_NOFILEHANDLE is returned only
when the clients sends malformed request. FreeBSD nfsd implementation chooses
to ignore that fact and returns this error code also for correctly formed
requests that it can not service due to the restrictions in the server
configuration.

nfs4: Fix CID #1032257: ERR_DENIED is expected only when a cookie is given

nfs4: Fix CID #1032280: Prevent integer overflow

* Do not increase delay after tenth attempt
* Cast 1 to bigtime_t before shifting it left

nfs4: make sure retry delay won't get out of bigtime_t range

nfs4: silent "suggest parentheses" GCC warning

nfs4: fix incrementing owner sequence id in some cases

If in a compound request an error occurs before the operation that takes
sequence id is executed (e.g. OPEN or LOCK) do not increment sequence id
regardless of the error code.

nfs4: use exponential backoff when the server ask to wait

nfs4: Fix handling of retried CLOSE requests

nfs4: Fix typo: NFS4ERR_LOCKS_HELD instead of NFS4ERR_LOCK_HELD

nfs4: Add assertions for unexpected error codes

There are some NFS4 error codes we should not get if the client is operating
correctly.
CLID_INUSE may be caused only by incorrectly generated SETCLIENTID request.
NOFILEHANDLE, RESTOREFH and OP_ILLEGAL indicate that the client has sent
an incorrectly build request.
BAD_STATEID and BAD_SEQID indicate a bug in handling {open,lock}_owners.
LOCK_HELD happens when the client incorrectly cleans up after accessing a file.

nfs4: Add numerous assertion checks

nfs4: Fix node removal

nfs4: Make the client more configurable

nfs4: Check for semaphore creation errors in ConnectionBase classes

nfs4: Add node to inode to file handle map before notifying

nfs4: Make sure that request are properly sequenced

nfs4: Fix server reboot recovery

nfs4: Add basic support for extended attributes

nfs4: Reclaim delegations after server reboot

nfs4: Use one open state per inode

nfs4: Use global open owner, check whether delegation was granted

nfs4: NFS4Object::HandleErrors needs OpenState or OpenFileCookie object

nfs4: Do not open too much files on server

nfs4: Move low level NFS4 code to Inode's base class